Merge branch 'master' of https://bdgit.educoder.net/plebkff6w/text4

.vscode/extensions.json

@@ -1,5 +0,0 @@
-{
-    "recommendations": [
-        "mhutchie.git-graph"
-    ]
-}

README.md

@@ -128,7 +128,7 @@
 -------------------------------------------------------
 | NUMBER | NAME                             | ON HAND |
 -------------------------------------------------------
-|    101 | 小李                            |      80 |
+|    101 | 小米                             |      80 |
 -------------------------------------------------------
 
 ```
@@ -291,3 +291,161 @@ a: No such file or directory
 6 修改 | 7 删除 | 8 排序 | 9 图表 | 0 退出
 
 ```
+
+## 概要设计
+
+系统主要分为用户界面和数据处理两大模块。
+用户界面模块包括系统初始化（init），显示菜单（display_menu），选择菜单命令（make_choice）、确认（confirm）、退出（quit）等子模块。
+数据处理模块包括读取数据（read_data）、保存数据（save_data）、打印数据（print_data）、查询数据（query_data）、添加数据（add_data）、更新数据（update_data）、删除数据（delete_data）、数据排序（sort_data）和生成图表（make_chart）等子模块。其中查询、添加、更新和删除数据还会用到根据编号查询数据的方法（find）。
+
+上述各模块通过主程序（main）进行调用，系统模块图如下。
+
+![](pictures/xitongmoban.drawio.svg)
+
+
+
+各模块的主要功能如下：
+
+#### main
+
+系统主函数模块，显示菜单，根据用户选择的菜单命令，执行相关操作。
+
+#### init
+
+系统初始化。
+
+#### display_menu
+
+显示菜单命令。
+
+## 详细设计
+
+针对概要设计
+
+#### main
+
+Step 1: 初始化
+Step 2: 根据用户选择的命令执行对应的操作
+Step 2.1: 显示菜单
+Step 2.2: 选择菜单命令 c
+Step 2.3: if c == CMD_READ then 读取数据
+Step 2.4: if c == CMD_SAVE then 保存数据
+Step 2.5: if c == CMD_PRINT then 打印数据
+Step 2.6: if c == CMD_QUERY then 查询数据
+Step 2.7: if c == CMD_ADD then 添加数据
+Step 2.8: if c == CMD_UPDATE then 修改数据
+Step 2.9: if c == CMD_DELETE then 删除数据
+Step 2.10: if c == CMD_SORT then 排序数据
+Step 2.11: if c == CMD_MAKE then 显示图表
+Step 2.12: if c == CMD_QUIT then 退出
+
+
+![](pictures/main_chart.drawio.svg)
+
+
+#### read_data
+
+Step 1: 输入文件名
+Step 2: 打开文件
+Step 3: if 文件为空 then 结束
+Step 4: else 读取文件
+Step 5: 提示读取并记录
+
+![](pictures/read.drawio.svg)
+
+
+#### save_data
+
+Step 1: 输入文件名
+Step 2: 打开文件
+Step 3: if 打开文件失败 then 提示打开文件失败并结束
+Step 4: 将所有库存记录写入文件
+Step 5: 关闭文件
+
+![](pictures/save_data.drawio.svg)
+
+#### print_data
+
+Step 1: 输出学号、姓名、成绩
+
+![](pictures/print.drawio.svg)
+
+#### query_data
+
+Step 1: 输入学生学号
+Step 2: if学号不存在 then 提示学生不存在并结束 
+Step 3: else 学号存在 then 输出学号、姓名、成绩 
+
+![](pictures/query_data.drawio.svg)
+
+#### add_data
+
+Step 1: if 数据库满 then 提示数据库满并结束
+Step 2: 输入学号
+Step 3: if 学生已存在 then 提示学生已存在并结束
+Step 4: 输入学生名字和成绩
+Step 5: 添加学生到数据
+Step 6: 提示添加成功
+
+![](pictures/add_data.drawio.svg)
+
+#### update_data
+
+Step 1: 输入学号
+Step 2: if 不存在 then 提示学生不存在并结束
+Step 3: else 输入学号、姓名、成绩
+Step 4: 已更新 
+
+![](pictures/updata_data.drawio.svg)
+
+#### delete_data
+
+Step 1: 输入学号
+Step 2: if 不存在 then 提示学生不存在并结束
+Step 3: else 删除学生信息
+Step 4: 提示删除成功
+
+![](pictures/delete.drawio.svg)
+
+
+#### sort_data
+Step 1: 读取文件
+Step 2: 进行排序
+Step 3: 提示排序已完成
+
+![](pictures/sort.drawio.svg)
+
+
+#### make_chart
+
+Step 1: 读取文件
+Step 2: 显示图表
+
+![](pictures/make_chart.drawio.svg)
+
+
+#### confirm
+
+Step 1: 输出 确定要退出吗
+Step 2: if 确认 then 退出
+
+![](pictures/confirm.drawio.svg)
+
+## 总结反思
+
+#####董函铄
+在这个项目中，我们的团队旨在建立一个学生成绩管理系统，为了更好的完成这个项目，我们团队进行了分工协作，将这个项目划分成几个小部分，每个人完成自己的工作部分，最后再有组长检查整合。在这次团队项目中，我们运用VS-code，头歌进行工作，在工作中我们也会遇到一些问题，例如合并请求冲突，流程图上传失败等，但是在团队和老师的帮助下，都一一解决了。在这次项目中，我学会了用vs-code画流程图，学会了如何建立分支、合并分支，也知道了团队协作的重要性，团队协作可以高效地完成工作，当然团队协作也会出现一些矛盾，每个人对待问题的解决方法不同，这些都是我们需要讨论协调的。
+总之，通过这次小组项目我对vscode的功能有了更新的认识，了解了更多的功能，也明白了小组协作的重要性，在小组协作中我们要学会理解信任，进行合理有效的沟通。
+
+#####胡煜男
+在团队合作中，我学到了以下几点：
+1. 理解与包容：每个人的思维和行为方式都不同，但这并不代表每个人都是错误的。在团队协作中，要学会理解和包容其他人的想法，不要因为意见不同而产生摩擦和矛盾。2. 合理分工：团队协作需要进行合理分工，每个人应该清楚自己的职责和任务，同时也要关注整个团队的进展和目标。
+3. 及时沟通：团队协作需要及时沟通，共享信息和意见。这样可以有效避免误解和错误，并且可以让整个团队更加紧密地协作起来。
+总之，小组合作对于实现共同目标和达成工作任务至关重要。在一个整体中，每个人都应该学会互相信任、理解与包容、合理分工以及及时沟通，这样才能够更加高效地完成工作任务。
+
+#####于博
+在这次团队合作项目中我学会了很多东西，比如：如何更好的去发挥自己和团队的优势；如何处理好人际关系；如何面对困难与挫折；如何面对压力和挑战；如何调整自己的心态、提升自己的自信……在这次活动中让我感觉到了团队精神的重要性。
+我们在训练中每个人都有自己的优势和不足，在合作中要发挥自己的优势，弥补自己的不足，这需要我们在平时的工作中学会沟通与交流，互相学习与信任。当我们站在高坡上向下眺望，心中不免会有些恐惧，但是当我们迈出第一步时，就会发现其实并没有想象中的那么可怕，在经过一段时间后就会发现自己已经完全克服了内心的恐惧，当我们从高处往下看时就像站在云上一样，非常的自在与舒适。在这次训练中我明白了团队合作的重要性，团结力量大。这次训练给我最大的感触就是每个人都离不开团队，在一个团队中每个人都应该发挥自己的长处去服务于这个团队。
+
+#####袁楷昊
+通过这次的小组项目合作，我感受到了小组内部明确的分工合作，让我看到了一位认真务实、严谨负责、富有领导力的组长，在她的领导下我们才能快速高效的完成此次的小组项目，让我对小组项目的具体流程，分工合作的方式方法有了一定的认识，学会了如何进行分工协作，提高了小组合作的能力，让我看到了这个专业的一种作用。同时，也让同学之间有了更深的认识，非常感谢老师能够给予的这次小组合作的机会，以及组员之间的默契合作。

pictures/add_data.drawio.svg

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+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 238px; height: 1px; padding-top: 300px; margin-left: 271px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                学号存在？
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="390" y="304" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    学号存在？
+                </text>
+            </switch>
+        </g>
+        <path d="M 390 440 L 390 500 Q 390 510 380 510 L 96.37 510" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 91.12 510 L 98.12 506.5 L 96.37 510 L 98.12 513.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 310 440 L 330 390 L 470 390 L 450 440 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 158px; height: 1px; padding-top: 415px; margin-left: 311px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                显示：学号已存在
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="390" y="419" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    显示：学号已存在
+                </text>
+            </switch>
+        </g>
+        <rect x="355" y="345" width="30" height="30" fill="none" stroke="none" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 360px; margin-left: 370px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: nowrap;">
+                                Y
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="370" y="364" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <path d="M 710 420 L 710 453.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 710 458.88 L 706.5 451.88 L 710 453.63 L 713.5 451.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 650 420 L 670 380 L 770 380 L 750 420 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 400px; margin-left: 651px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                输入姓名
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="710" y="404" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入姓名
+                </text>
+            </switch>
+        </g>
+        <path d="M 710 500 L 710 533.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 710 538.88 L 706.5 531.88 L 710 533.63 L 713.5 531.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 650 500 L 670 460 L 770 460 L 750 500 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 480px; margin-left: 651px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                输入成绩
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="710" y="484" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入成绩
+                </text>
+            </switch>
+        </g>
+        <path d="M 710 580 L 710 603.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 710 608.88 L 706.5 601.88 L 710 603.63 L 713.5 601.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="650" y="540" width="120" height="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 560px; margin-left: 651px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                添加到学生数据科
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="710" y="564" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    添加到学生数据科
+                </text>
+            </switch>
+        </g>
+        <path d="M 710 650 L 710 690 Q 710 700 700 700 L 96.37 700" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 91.12 700 L 98.12 696.5 L 96.37 700 L 98.12 703.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 650 650 L 670 610 L 770 610 L 750 650 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 630px; margin-left: 651px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                显示：零件已添加
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="710" y="634" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    显示：零件已添加
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="90" cy="795" rx="60" ry="25" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

pictures/confirm.drawio.svg

@@ -0,0 +1,90 @@
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="441px" height="621px" viewBox="-0.5 -0.5 441 621" content="&lt;mxfile&gt;&lt;diagram id=&quot;xqaYZJClM3BCu8lo3jDS&quot; name=&quot;Page-1&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+    <defs/>
+    <g>
+        <ellipse cx="80" cy="40" rx="70" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 40px; margin-left: 11px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                confirm
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="80" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    confirm
+                </text>
+            </switch>
+        </g>
+        <path d="M 0 230 L 20 150 L 160 150 L 140 230 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 158px; height: 1px; padding-top: 190px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                提示确定要退出吗
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="80" y="194" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    提示确定要退出吗
+                </text>
+            </switch>
+        </g>
+        <path d="M 0 380 L 20 300 L 160 300 L 140 380 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 158px; height: 1px; padding-top: 340px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                退出？
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="80" y="344" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    退出？
+                </text>
+            </switch>
+        </g>
+        <path d="M 300 500 L 320 420 L 440 420 L 420 500 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 460px; margin-left: 301px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                确认
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="370" y="464" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    确认
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="80" cy="580" rx="70" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 370 500 L 370 570 Q 370 580 360 580 L 156.37 580" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 151.12 580 L 158.12 576.5 L 156.37 580 L 158.12 583.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 150 340 L 375 340 Q 385 340 384.98 350 L 384.85 410.59" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 384.84 415.84 L 381.36 408.83 L 384.85 410.59 L 388.36 408.85 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 80 230 L 80 293.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 80 298.88 L 76.5 291.88 L 80 293.63 L 83.5 291.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 80 80 L 80 143.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 80 148.88 L 76.5 141.88 L 80 143.63 L 83.5 141.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

pictures/delete.drawio.svg

@@ -0,0 +1,129 @@
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="621px" height="841px" viewBox="-0.5 -0.5 621 841" content="&lt;mxfile&gt;&lt;diagram id=&quot;qF64KuNW_ocn6PQy4_HQ&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+    <defs/>
+    <g>
+        <ellipse cx="70" cy="40" rx="60" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 40px; margin-left: 11px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                delete_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="70" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    delete_data
+                </text>
+            </switch>
+        </g>
+        <path d="M 10 210 L 30 150 L 130 150 L 110 210 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 180px; margin-left: 11px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                输入学号
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="70" y="184" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入学号
+                </text>
+            </switch>
+        </g>
+        <path d="M 65 360 L 65 503.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 65 508.88 L 61.5 501.88 L 65 503.63 L 68.5 501.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 130 320 L 569 320 Q 579 320 578.96 330 L 578.86 354.65" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 578.84 359.9 L 575.37 352.89 L 578.86 354.65 L 582.37 352.92 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 65 280 L 130 320 L 65 360 L 0 320 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 128px; height: 1px; padding-top: 320px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                学号存在？
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="65" y="324" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    学号存在？
+                </text>
+            </switch>
+        </g>
+        <path d="M 65 570 L 65 753.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 65 758.88 L 61.5 751.88 L 65 753.63 L 68.5 751.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 5 570 L 25 510 L 125 510 L 105 570 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 540px; margin-left: 6px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                学号不存在
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="65" y="544" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    学号不存在
+                </text>
+            </switch>
+        </g>
+        <path d="M 500 420 L 520 360 L 620 360 L 600 420 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 390px; margin-left: 501px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                删除学生信息
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="560" y="394" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    删除学生信息
+                </text>
+            </switch>
+        </g>
+        <path d="M 560 520 L 560 710 Q 560 720 550 720 L 76.37 720" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 71.12 720 L 78.12 716.5 L 76.37 720 L 78.12 723.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 500 520 L 520 460 L 620 460 L 600 520 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 490px; margin-left: 501px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                已更新
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="560" y="494" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    已更新
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="65" cy="800" rx="60" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 70 80 L 70 143.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 70 148.88 L 66.5 141.88 L 70 143.63 L 73.5 141.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 70 210 L 70 283.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 70 288.88 L 66.5 281.88 L 70 283.63 L 73.5 281.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 590 460 L 590 420" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

pictures/main_chart.drawio.svg

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+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
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+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                main
+                            </div>
+                        </div>
+                    </div>
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+                <text x="85" y="39" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
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+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 145px; margin-left: 26px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                init
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="149" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    init
+                </text>
+            </switch>
+        </g>
+        <rect x="10" y="210" width="150" height="50" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 25 210 L 25 260 M 145 210 L 145 260" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 235px; margin-left: 26px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                display_menu
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="239" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    display_menu
+                </text>
+            </switch>
+        </g>
+        <rect x="10" y="300" width="150" height="50" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 25 300 L 25 350 M 145 300 L 145 350" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 325px; margin-left: 26px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                c==make_chioice
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="329" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    c==make_chioice
+                </text>
+            </switch>
+        </g>
+        <rect x="370" y="410" width="150" height="50" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 385 410 L 385 460 M 505 410 L 505 460" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 435px; margin-left: 386px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                read_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="445" y="439" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    read_data
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 400 L 170 435 L 85 470 L 0 435 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 435px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                c==CMD_READ
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="439" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    c==CMD_READ
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 510 L 170 545 L 85 580 L 0 545 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 545px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                c==CMD_SAVE
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="549" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    c==CMD_SAVE
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 620 L 170 655 L 85 690 L 0 655 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 655px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                c==CMD_PRINT
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="659" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    c==CMD_PRINT
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 730 L 170 765 L 85 800 L 0 765 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 765px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                c==CMD_QUERY
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="769" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    c==CMD_QUERY
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 860 L 170 895 L 85 930 L 0 895 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 895px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                c==CMD_INSERT
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="899" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    c==CMD_INSERT
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 980 L 170 1015 L 85 1050 L 0 1015 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 1015px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                c==CMD_UPDATE
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="1019" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    c==CMD_UPDATE
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 1090 L 170 1125 L 85 1160 L 0 1125 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 1125px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                c==CMD_DELETE
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="1129" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    c==CMD_DELETE
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 1200 L 170 1235 L 85 1270 L 0 1235 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 1235px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                c==CMD_SORT
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="1239" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    c==CMD_SORT
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 1310 L 170 1345 L 85 1380 L 0 1345 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 1345px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                c==CMD_CHART
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="1349" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    c==CMD_CHART
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 1420 L 170 1455 L 85 1490 L 0 1455 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 1455px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                c==CMD_QUIT
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="1459" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    c==CMD_QUIT
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 1530 L 170 1565 L 85 1600 L 0 1565 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 1565px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                确定退出
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="1569" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    确定退出
+                </text>
+            </switch>
+        </g>
+        <rect x="12.5" y="1650" width="145" height="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 27.5 1650 L 27.5 1690 M 142.5 1650 L 142.5 1690" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 114px; height: 1px; padding-top: 1670px; margin-left: 29px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                quit
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="86" y="1674" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    quit
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+        <path d="M 385 520 L 385 570 M 505 520 L 505 570" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 545px; margin-left: 386px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                save_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="445" y="549" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    save_data
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+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 655px; margin-left: 386px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                peint_data
+                            </div>
+                        </div>
+                    </div>
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+                <text x="445" y="659" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    peint_data
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+            </switch>
+        </g>
+        <rect x="370" y="740" width="150" height="50" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 385 740 L 385 790 M 505 740 L 505 790" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 765px; margin-left: 386px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                query_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="445" y="769" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    query_data
+                </text>
+            </switch>
+        </g>
+        <rect x="370" y="870" width="150" height="50" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 385 870 L 385 920 M 505 870 L 505 920" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 895px; margin-left: 386px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                add_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="445" y="899" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    add_data
+                </text>
+            </switch>
+        </g>
+        <rect x="370" y="990" width="150" height="50" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 385 990 L 385 1040 M 505 990 L 505 1040" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 1015px; margin-left: 386px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                update_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="445" y="1019" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    update_data
+                </text>
+            </switch>
+        </g>
+        <rect x="370" y="1100" width="150" height="50" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 385 1100 L 385 1150 M 505 1100 L 505 1150" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 1125px; margin-left: 386px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                delete_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="445" y="1129" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    delete_data
+                </text>
+            </switch>
+        </g>
+        <rect x="370" y="1210" width="150" height="50" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 385 1210 L 385 1260 M 505 1210 L 505 1260" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 1235px; margin-left: 386px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                sort_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="445" y="1239" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    sort_data
+                </text>
+            </switch>
+        </g>
+        <rect x="370" y="1320" width="150" height="50" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 385 1320 L 385 1370 M 505 1320 L 505 1370" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 1345px; margin-left: 386px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                make_chart
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="445" y="1349" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    make_chart
+                </text>
+            </switch>
+        </g>
+        <path d="M 360 1480 L 380 1430 L 520 1430 L 500 1480 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 158px; height: 1px; padding-top: 1455px; margin-left: 361px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                命令错误，请重新选择
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="440" y="1459" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    命令错误，请重新选择
+                </text>
+            </switch>
+        </g>
+        <path d="M 170 1455 L 363.63 1455" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 368.88 1455 L 361.88 1458.5 L 363.63 1455 L 361.88 1451.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 1456px; margin-left: 271px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; background-color: rgb(255, 255, 255); white-space: nowrap;">
+                                N
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="271" y="1459" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    N
+                </text>
+            </switch>
+        </g>
+        <path d="M 170 1345 L 363.63 1345" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 368.88 1345 L 361.88 1348.5 L 363.63 1345 L 361.88 1341.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 1346px; margin-left: 271px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; background-color: rgb(255, 255, 255); white-space: nowrap;">
+                                Y
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="271" y="1349" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <path d="M 170 1235 L 363.63 1235" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 368.88 1235 L 361.88 1238.5 L 363.63 1235 L 361.88 1231.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 1236px; margin-left: 271px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; background-color: rgb(255, 255, 255); white-space: nowrap;">
+                                Y
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="271" y="1239" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <path d="M 170 1125 L 363.63 1125" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 368.88 1125 L 361.88 1128.5 L 363.63 1125 L 361.88 1121.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 1126px; margin-left: 271px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; background-color: rgb(255, 255, 255); white-space: nowrap;">
+                                Y
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="271" y="1129" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <path d="M 170 1015 L 363.63 1015" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 368.88 1015 L 361.88 1018.5 L 363.63 1015 L 361.88 1011.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 1016px; margin-left: 271px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; background-color: rgb(255, 255, 255); white-space: nowrap;">
+                                Y
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="271" y="1019" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <path d="M 170 895 L 363.63 895" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 368.88 895 L 361.88 898.5 L 363.63 895 L 361.88 891.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 896px; margin-left: 271px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; background-color: rgb(255, 255, 255); white-space: nowrap;">
+                                Y
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="271" y="899" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <path d="M 170 765 L 363.63 765" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 368.88 765 L 361.88 768.5 L 363.63 765 L 361.88 761.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 766px; margin-left: 271px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; background-color: rgb(255, 255, 255); white-space: nowrap;">
+                                Y
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="271" y="769" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <path d="M 170 655 L 363.63 655" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 368.88 655 L 361.88 658.5 L 363.63 655 L 361.88 651.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 655px; margin-left: 270px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; background-color: rgb(255, 255, 255); white-space: nowrap;">
+                                Y
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="270" y="658" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <path d="M 170 545 L 363.63 545" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 368.88 545 L 361.88 548.5 L 363.63 545 L 361.88 541.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 546px; margin-left: 271px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; background-color: rgb(255, 255, 255); white-space: nowrap;">
+                                Y
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="271" y="549" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <path d="M 170 435 L 363.63 435" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 368.88 435 L 361.88 438.5 L 363.63 435 L 361.88 431.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 436px; margin-left: 271px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; background-color: rgb(255, 255, 255); white-space: nowrap;">
+                                Y
+                            </div>
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+                    </div>
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+                <text x="271" y="439" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
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+        <path d="M 628.88 435 L 621.88 438.5 L 623.63 435 L 621.88 431.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="245" y="1535" width="30" height="30" fill="none" stroke="none" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 1550px; margin-left: 260px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: nowrap;">
+                                N
+                            </div>
+                        </div>
+                    </div>
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+                <text x="260" y="1554" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    N
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+        </g>
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+        <path d="M 628.88 1455 L 621.88 1458.5 L 623.63 1455 L 621.88 1451.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
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+        <path d="M 628.88 1235 L 621.88 1238.5 L 623.63 1235 L 621.88 1231.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
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+        <path d="M 520 655 L 623.63 655" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
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+        <path d="M 520 545 L 623.63 545" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 628.88 545 L 621.88 548.5 L 623.63 545 L 621.88 541.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

pictures/make_chart.drawio.svg

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+    <defs/>
+    <g>
+        <ellipse cx="75" cy="40" rx="70" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 40px; margin-left: 6px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                make_chart
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="75" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    make_chart
+                </text>
+            </switch>
+        </g>
+        <path d="M 5 220 L 25 150 L 145 150 L 125 220 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 185px; margin-left: 6px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                读取文件
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="75" y="189" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    读取文件
+                </text>
+            </switch>
+        </g>
+        <path d="M 0 350 L 20 280 L 140 280 L 120 350 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 315px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                显示文件
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="70" y="319" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    显示文件
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="70" cy="450" rx="60" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 75 80 L 75 143.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 75 148.88 L 71.5 141.88 L 75 143.63 L 78.5 141.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 75 220 L 75 273.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 75 278.88 L 71.5 271.88 L 75 273.63 L 78.5 271.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 70 350 L 70 403.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 70 408.88 L 66.5 401.88 L 70 403.63 L 73.5 401.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

pictures/print.drawio.svg

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+    <defs/>
+    <g>
+        <path d="M 75 70 L 75 103.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 75 108.88 L 71.5 101.88 L 75 103.63 L 78.5 101.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <ellipse cx="75" cy="35" rx="65" ry="35" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 128px; height: 1px; padding-top: 35px; margin-left: 11px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                print_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="75" y="39" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    print_data
+                </text>
+            </switch>
+        </g>
+        <path d="M 75 170 L 75 213.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 75 218.88 L 71.5 211.88 L 75 213.63 L 78.5 211.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 0 170 L 20 110 L 150 110 L 130 170 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 148px; height: 1px; padding-top: 140px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                输出学号姓名成绩
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="75" y="144" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输出学号姓名成绩
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="75" cy="260" rx="70" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

pictures/read.drawio.svg

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+    <defs/>
+    <g>
+        <path d="M 85 70 L 85 83.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 85 88.88 L 81.5 81.88 L 85 83.63 L 88.5 81.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <ellipse cx="85" cy="35" rx="75" ry="35" fill="#ffffff" stroke="#000000" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 148px; height: 1px; padding-top: 35px; margin-left: 11px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000">
+                                    read_data
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="39" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    read_data
+                </text>
+            </switch>
+        </g>
+        <path d="M 85 160 L 85 181.88" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 85 188.88 L 82.67 181.88 L 87.33 181.88 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 85 250 L 85 271.88" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 85 278.88 L 82.67 271.88 L 87.33 271.88 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 75 250 L 20 250 Q 10 250 13.16 240.51 L 26.84 199.49 Q 30 190 40 190 L 150 190 Q 160 190 156.84 199.49 L 143.16 240.51 Q 140 250 130 250 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 148px; height: 1px; padding-top: 220px; margin-left: 11px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000">
+                                    打开文件
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="224" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    打开文件
+                </text>
+            </switch>
+        </g>
+        <path d="M 170 320 L 270 320 Q 280 320 280 330 L 280 371.88" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 280 378.88 L 277.67 371.88 L 282.33 371.88 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 85 360 L 85 591.88" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 85 598.88 L 82.67 591.88 L 87.33 591.88 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 42.5 300 L 75.95 284.26 Q 85 280 94.05 284.26 L 160.95 315.74 Q 170 320 160.95 324.26 L 94.05 355.74 Q 85 360 75.95 355.74 L 9.05 324.26 Q 0 320 9.05 315.74 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 320px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000">
+                                    文件为空？
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="324" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    文件为空？
+                </text>
+            </switch>
+        </g>
+        <path d="M 280 440 L 280 471.88" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 280 478.88 L 277.67 471.88 L 282.33 471.88 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 270 440 L 220 440 Q 210 440 213.16 430.51 L 226.84 389.49 Q 230 380 240 380 L 340 380 Q 350 380 346.84 389.49 L 333.16 430.51 Q 330 440 320 440 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 410px; margin-left: 211px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000">
+                                    读取文件
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="280" y="414" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    读取文件
+                </text>
+            </switch>
+        </g>
+        <path d="M 280 540 L 280 570 Q 280 580 270 580 L 88.12 580" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 81.12 580 L 88.12 577.67 L 88.12 582.33 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 270 540 L 220 540 Q 210 540 213.16 530.51 L 226.84 489.49 Q 230 480 240 480 L 340 480 Q 350 480 346.84 489.49 L 333.16 530.51 Q 330 540 320 540 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 510px; margin-left: 211px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000">
+                                    显示数据，记录
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="280" y="514" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    显示数据，记录
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="85" cy="635" rx="70" ry="35" fill="#ffffff" stroke="#000000" pointer-events="all"/>
+        <path d="M 85 150 L 85 183.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 85 188.88 L 81.5 181.88 L 85 183.63 L 88.5 181.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 10 150 L 30 90 L 160 90 L 140 150 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 148px; height: 1px; padding-top: 120px; margin-left: 11px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000">
+                                    输入文件名
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="85" y="124" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入文件名
+                </text>
+            </switch>
+        </g>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

pictures/save_data.drawio.svg

@@ -0,0 +1,163 @@
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="341px" height="751px" viewBox="-0.5 -0.5 341 751" content="&lt;mxfile&gt;&lt;diagram id=&quot;upyrMhvOQVLzjFjaz9En&quot; name=&quot;Page-1&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+    <defs/>
+    <g>
+        <path d="M 80 70 L 80 103.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 80 108.88 L 76.5 101.88 L 80 103.63 L 83.5 101.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <ellipse cx="80" cy="35" rx="80" ry="35" fill="#ffffff" stroke="#000000" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 158px; height: 1px; padding-top: 35px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000">
+                                    save_data
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="80" y="39" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    save_data
+                </text>
+            </switch>
+        </g>
+        <path d="M 80 400 L 80 413.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 80 418.88 L 76.5 411.88 L 80 413.63 L 83.5 411.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 40 332.5 L 71.28 314.9 Q 80 310 88.72 314.9 L 151.28 350.1 Q 160 355 151.28 359.9 L 88.72 395.1 Q 80 400 71.28 395.1 L 8.72 359.9 Q 0 355 8.72 350.1 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 158px; height: 1px; padding-top: 355px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000">
+                                    打开文件成功？
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="80" y="359" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    打开文件成功？
+                </text>
+            </switch>
+        </g>
+        <path d="M 145 460 L 144.16 461.67" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 141.82 466.37 L 141.82 458.54 L 144.16 461.67 L 148.08 461.67 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="0" y="540" width="150" height="70" rx="10.5" ry="10.5" fill="#ffffff" stroke="#000000" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 148px; height: 1px; padding-top: 575px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000" style="font-size: 12px;">
+                                    关闭文件
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="75" y="579" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    关闭文件
+                </text>
+            </switch>
+        </g>
+        <path d="M 260 590 L 210 590 Q 200 590 202.75 580.38 L 217.25 529.62 Q 220 520 230 520 L 330 520 Q 340 520 337.25 529.62 L 322.75 580.38 Q 320 590 310 590 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 555px; margin-left: 201px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000">
+                                    提示打开文件失败
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="270" y="559" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    提示打开文件失败
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="75" cy="715" rx="75" ry="35" fill="#ffffff" stroke="#000000" pointer-events="all"/>
+        <path d="M 80 170 L 80 203.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 80 208.88 L 76.5 201.88 L 80 203.63 L 83.5 201.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 10 170 L 30 110 L 150 110 L 130 170 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 140px; margin-left: 11px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000">
+                                    输入文件名
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="80" y="144" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入文件名
+                </text>
+            </switch>
+        </g>
+        <rect x="20" y="210" width="120" height="60" rx="9" ry="9" fill="#ffffff" stroke="#000000" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 240px; margin-left: 21px;">
+                        <div data-drawio-colors="color: #000000; " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                打开文件夹
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="80" y="244" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    打开文件夹
+                </text>
+            </switch>
+        </g>
+        <path d="M 10 420 L 150 420 L 150 488 Q 115 466.4 80 488 Q 45 509.6 10 488 L 10 432 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 448px; margin-left: 11px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font color="#000000">
+                                    把所有库存记录写入文件
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="80" y="452" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    把所有库存记录写入文件
+                </text>
+            </switch>
+        </g>
+        <path d="M 75.24 491.36 L 75.03 533.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 75.01 538.88 L 71.54 531.86 L 75.03 533.63 L 78.54 531.9 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 270 590 L 270 640 Q 270 650 260 650 L 81.37 650" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 76.12 650 L 83.12 646.5 L 81.37 650 L 83.12 653.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 150 355 L 260 355 Q 270 355 270 365 L 270 513.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 270 518.88 L 266.5 511.88 L 270 513.63 L 273.5 511.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 80 270 L 80 303.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 80 308.88 L 76.5 301.88 L 80 303.63 L 83.5 301.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 75 610 L 75 673.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 75 678.88 L 71.5 671.88 L 75 673.63 L 78.5 671.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

pictures/sort.drawio.svg

@@ -0,0 +1,90 @@
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="121px" height="581px" viewBox="-0.5 -0.5 121 581" content="&lt;mxfile&gt;&lt;diagram id=&quot;N-I4I6gAUj6rZipbi3T4&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+    <defs/>
+    <g>
+        <path d="M 60 80 L 60 133.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 138.88 L 56.5 131.88 L 60 133.63 L 63.5 131.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <ellipse cx="60" cy="40" rx="60" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 40px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                sort_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    sort_data
+                </text>
+            </switch>
+        </g>
+        <path d="M 60 200 L 60 253.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 258.88 L 56.5 251.88 L 60 253.63 L 63.5 251.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 0 200 L 20 140 L 120 140 L 100 200 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 170px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                读取文件
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="174" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    读取文件
+                </text>
+            </switch>
+        </g>
+        <path d="M 60 320 L 60 373.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 378.88 L 56.5 371.88 L 60 373.63 L 63.5 371.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 0 320 L 20 260 L 120 260 L 100 320 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 290px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                排序
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="294" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    排序
+                </text>
+            </switch>
+        </g>
+        <path d="M 60 440 L 60 493.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 498.88 L 56.5 491.88 L 60 493.63 L 63.5 491.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 0 440 L 20 380 L 120 380 L 100 440 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 410px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                提示排序已完成
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="414" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    提示排序已完成
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="60" cy="540" rx="60" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

pictures/updata_data.drawio.svg

@@ -0,0 +1,164 @@
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="466px" height="691px" viewBox="-0.5 -0.5 466 691" content="&lt;mxfile&gt;&lt;diagram id=&quot;ui3Me32tS_vx9kzB5S0c&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+    <defs/>
+    <g>
+        <path d="M 100 70 L 100 123.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 100 128.88 L 96.5 121.88 L 100 123.63 L 103.5 121.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <ellipse cx="100" cy="35" rx="60" ry="35" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 35px; margin-left: 41px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                updata_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="100" y="39" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    updata_data
+                </text>
+            </switch>
+        </g>
+        <path d="M 100 180 L 100 238.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 100 243.88 L 96.5 236.88 L 100 238.63 L 103.5 236.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 40 180 L 60 130 L 160 130 L 140 180 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 155px; margin-left: 41px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                输入学号
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="100" y="159" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入学号
+                </text>
+            </switch>
+        </g>
+        <path d="M 200 285 L 388 285 Q 398 285 397.93 295 L 397.75 318.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 397.71 323.88 L 394.26 316.86 L 397.75 318.63 L 401.26 316.91 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 100 325 L 100 393.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 100 398.88 L 96.5 391.88 L 100 393.63 L 103.5 391.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 100 245 L 200 285 L 100 325 L 0 285 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 198px; height: 1px; padding-top: 285px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                学号存在？
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="100" y="289" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    学号存在？
+                </text>
+            </switch>
+        </g>
+        <path d="M 397.5 380 L 397.5 453.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 397.5 458.88 L 394 451.88 L 397.5 453.63 L 401 451.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 330 380 L 350 325 L 465 325 L 445 380 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 133px; height: 1px; padding-top: 353px; margin-left: 331px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                输出学号姓名成绩
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="398" y="356" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输出学号姓名成绩
+                </text>
+            </switch>
+        </g>
+        <rect x="295" y="255" width="30" height="30" fill="none" stroke="none" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 270px; margin-left: 310px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: nowrap;">
+                                Y
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="310" y="274" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <path d="M 397.58 515 L 397.97 645 Q 398 655 388 655 L 166.37 655" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 161.12 655 L 168.12 651.5 L 166.37 655 L 168.12 658.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 330 515 L 350 460 L 465 460 L 445 515 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 133px; height: 1px; padding-top: 488px; margin-left: 331px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                已更新
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="398" y="491" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    已更新
+                </text>
+            </switch>
+        </g>
+        <path d="M 100 450 L 100 613.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 100 618.88 L 96.5 611.88 L 100 613.63 L 103.5 611.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 40 450 L 60 400 L 160 400 L 140 450 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 425px; margin-left: 41px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                学号不存在
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="100" y="429" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    学号不存在
+                </text>
+            </switch>
+        </g>
+        <rect x="105" y="335" width="30" height="30" fill="none" stroke="none" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 350px; margin-left: 120px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: nowrap;">
+                                N
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="120" y="354" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    N
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="100" cy="655" rx="60" ry="35" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

pictures/xitongmoban.drawio.svg

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+    <defs/>
+    <g>
+        <rect x="0" y="150" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 180px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                init
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="184" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    init
+                </text>
+            </switch>
+        </g>
+        <rect x="0" y="230" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 260px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                display_menu
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="264" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    display_menu
+                </text>
+            </switch>
+        </g>
+        <rect x="0" y="310" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 340px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                make_choice
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="344" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    make_choice
+                </text>
+            </switch>
+        </g>
+        <rect x="0" y="400" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 430px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                confirm
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="434" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    confirm
+                </text>
+            </switch>
+        </g>
+        <rect x="0" y="490" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 520px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                quit
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="524" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    quit
+                </text>
+            </switch>
+        </g>
+        <path d="M 255 340 L 126.37 340" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 121.12 340 L 128.12 336.5 L 126.37 340 L 128.12 343.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 375 340 L 533.63 340" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 538.88 340 L 531.88 343.5 L 533.63 340 L 531.88 336.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="255" y="310" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 340px; margin-left: 256px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                main
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="315" y="344" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    main
+                </text>
+            </switch>
+        </g>
+        <rect x="540" y="0" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 30px; margin-left: 541px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                read_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="600" y="34" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    read_data
+                </text>
+            </switch>
+        </g>
+        <rect x="540" y="70" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 100px; margin-left: 541px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                save_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="600" y="104" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    save_data
+                </text>
+            </switch>
+        </g>
+        <rect x="540" y="140" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 170px; margin-left: 541px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                print_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="600" y="174" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    print_data
+                </text>
+            </switch>
+        </g>
+        <path d="M 660 250 L 760 250 Q 770 250 770 260 L 770 536.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 770 541.88 L 766.5 534.88 L 770 536.63 L 773.5 534.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="540" y="220" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 250px; margin-left: 541px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                query_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="600" y="254" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    query_data
+                </text>
+            </switch>
+        </g>
+        <rect x="540" y="310" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 340px; margin-left: 541px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                add_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="600" y="344" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    add_data
+                </text>
+            </switch>
+        </g>
+        <rect x="540" y="390" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 420px; margin-left: 541px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                update_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="600" y="424" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    update_data
+                </text>
+            </switch>
+        </g>
+        <rect x="540" y="470" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 500px; margin-left: 541px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                delete_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="600" y="504" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    delete_data
+                </text>
+            </switch>
+        </g>
+        <rect x="540" y="543" width="120" height="57.5" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 572px; margin-left: 541px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                sort_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="600" y="575" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    sort_data
+                </text>
+            </switch>
+        </g>
+        <rect x="540" y="610" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 640px; margin-left: 541px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                make_data
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="600" y="644" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    make_data
+                </text>
+            </switch>
+        </g>
+        <path d="M 200 340 L 200 270 Q 200 260 200 250 L 200 190 Q 200 180 190 180 L 126.37 180" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 121.12 180 L 128.12 176.5 L 126.37 180 L 128.12 183.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 200 260 L 126.37 260" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 121.12 260 L 128.12 256.5 L 126.37 260 L 128.12 263.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 200 340 L 200 525 Q 200 535 190 535 L 126.37 535" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 121.12 535 L 128.12 531.5 L 126.37 535 L 128.12 538.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 200 430 L 126.37 430" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 121.12 430 L 128.12 426.5 L 126.37 430 L 128.12 433.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 450 340 L 450 25 Q 450 15 460 15 L 533.63 15" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 538.88 15 L 531.88 18.5 L 533.63 15 L 531.88 11.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 450 340 L 450 630 Q 450 640 460 640 L 533.63 640" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 538.88 640 L 531.88 643.5 L 533.63 640 L 531.88 636.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 450 100 L 533.63 100" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 538.88 100 L 531.88 103.5 L 533.63 100 L 531.88 96.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 450 170 L 533.63 170" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 538.88 170 L 531.88 173.5 L 533.63 170 L 531.88 166.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 450 250 L 533.63 250" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 538.88 250 L 531.88 253.5 L 533.63 250 L 531.88 246.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 450 420 L 533.63 420" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 538.88 420 L 531.88 423.5 L 533.63 420 L 531.88 416.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 450 500 L 533.63 500" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 538.88 500 L 531.88 503.5 L 533.63 500 L 531.88 496.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 450 570 L 533.63 571.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 538.88 571.73 L 531.82 575.09 L 533.63 571.63 L 531.95 568.09 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="710" y="543" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 573px; margin-left: 711px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                find
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="770" y="577" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    find
+                </text>
+            </switch>
+        </g>
+        <path d="M 660 340 L 770 340" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 660 420 L 770 420" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 660 500 L 770 500" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

src/Makefile

@@ -0,0 +1,6 @@
+app: app.o data.o
+    gcc -o app app.o data.o
+app.o: app.c data.h
+    gcc -c app.c
+data.o: data.c data.h
+    gcc -c data.c

src/a.csv

@@ -0,0 +1,3 @@
+101 小米 80
+104 小刘 96
+100 小明 70 

src/app.c

@@ -0,0 +1,357 @@
+#define NAME_LEN 31
+#define MAX_PARTS 100
+//保存学生成绩信息的结构
+struct students
+{
+    int number;
+    char name[NAME_LEN + 1];
+    int score;
+};
+static struct students stu[MAX_PARTS];
+static int num_parts = 0;
+#include <stdio.h>
+#include <stdlib.h>
+
+//定义常量
+#define CMD_QUIT 0
+#define CMD_QUERY 4
+#define CMD_INSERT 5
+#define CMD_UPDATE 6
+#define CMD_DELETE 7
+#define CMD_READ 1
+#define CMD_SAVE 2
+#define CMD_PRINT 3
+#define CMD_SORT 8
+#define CMD_CHART 9
+// 菜单命令的编号
+
+// 函数声明
+void init(void);
+void quit(void);
+void display_menu(void);
+int make_choice(void);
+void read_data(void);   // 读取
+void save_data(void);   // 保存
+void print_data(void);  // 打印
+void query_data(void);  // 查询
+void add_data(void);    // 添加
+void update_data(void); // 修改
+void delete_data(void); // 删除
+void sort_data(void);   // 排序
+void make_chart(void);  // 图表
+int confirm(const char *msg);
+
+// 主程序
+int main(void)
+{
+    init(); // 程序启动
+    while (1)
+    {
+        display_menu();
+        int c = make_choice();
+        switch (c)
+        {
+        case CMD_QUERY:
+            query_data();
+            break;
+        case CMD_INSERT:
+            add_data();
+            break;
+        case CMD_UPDATE:
+            update_data();
+            break;
+        case CMD_DELETE:
+            delete_data();
+            break;
+        case CMD_READ:
+            read_data();
+            break;
+        case CMD_SAVE:
+            save_data();
+            break;
+        case CMD_PRINT:
+            print_data();
+            break;
+        case CMD_SORT:
+            sort_data();
+            break;
+        case CMD_CHART:
+            make_chart();
+            break;
+        default:
+            puts("命令错误，请重新选择");
+            break;
+        case CMD_QUIT:
+            if (confirm("确定要退出吗？"))
+                quit(); // 仅在确认后退出
+            break;
+        }
+    }
+    return 0;
+}
+
+// 函数定义
+void init(void)
+{
+    puts("程序启动");
+}
+void quit(void)
+{
+    puts("程序退出");
+    exit(EXIT_SUCCESS);
+}
+void display_menu(void)
+{
+    printf("\n%d 读取 | %d 保存 | %d 打印 | %d 查询 | %d 添加\n%d 修改 | %d 删除 | %d 排序 | %d 图表 | %d 退出\n\n", CMD_READ, CMD_SAVE, CMD_PRINT, CMD_QUERY, CMD_INSERT, CMD_UPDATE, CMD_DELETE, CMD_SORT, CMD_CHART, CMD_QUIT);
+}
+int make_choice(void)
+{
+    int c;     // 用户输入
+    int n = 0; // 正确读入的数据项个数
+    while (n == 0)
+    {
+        printf("请选择：");
+        n = scanf("%d", &c); // 尝试读入整数 c
+        scanf("%*[^\n]");    // 跳过一行中剩余的字符
+    }
+    return c;
+}
+
+//查询
+void query_data(void)
+{
+    int num;
+    printf("输入学生学号： ");
+    scanf("%d", &num);
+    int f = -1;
+    for (int i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = i;
+            break;
+        }
+    }
+    if (f == -1)
+    {
+        printf("学生不存在");
+    }
+    else
+    {
+        printf("学生学号：%d\n", stu[f].number);
+        printf("学生姓名：%s\n", stu[f].name);
+        printf("学生成绩：%d\n", stu[f].score);
+    }
+}
+
+//打印
+void print_data(void)
+{
+    printf("NUMBER  |  NAME                score\n");
+    for (int i = 0; i < num_parts; i++)
+    {
+        printf("%d  |  %s                    %d\n", stu[i].number, stu[i].name, stu[i].score);
+    }
+}
+
+//添加
+void add_data(void)
+{
+    int num;
+    printf("输入学生学号：");
+    scanf("%d", &num);
+    int f = 0;
+    for (int i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = 1;
+            break;
+        }
+    }
+    if (f == 0)
+    {
+        stu[num_parts].number = num;
+        printf("输入学生姓名：");
+        scanf("%s", &stu[num_parts].name);
+        printf("输入学生成绩：");
+        scanf("%d", &stu[num_parts].score);
+        num_parts++;
+        printf("学生 %d 添加成功\n", num);
+    }
+    else
+    {
+        printf("学生已存在");
+    }
+}
+
+//修改
+void update_data(void)
+{
+    int num;
+    printf("输入学生学号：");
+    scanf("%d", &num);
+    int f = 0;
+    for (int i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = 1;
+            break;
+        }
+    }
+    if (f == 0)
+    {
+        printf("学生不存在");
+    }
+    else
+    {
+        printf("输入学生学号：");
+        scanf("%d", &stu[num].number);
+        printf("输入学生姓名：");
+        scanf("%s", stu[num].name);
+        printf("输入学生成绩：");
+        scanf("%d", &stu[num].score);
+        printf("学生 %d 已更新", num);
+    }
+}
+
+//删除
+void delete_data(void)
+{
+    int num;
+    printf("输入学生学号：");
+    scanf("%d", &num);
+    int f = 0, i, j;
+    for (i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = 1;
+            break;
+        }
+    }
+    if (f == 0)
+    {
+        printf("学生不存在");
+    }
+    else
+    {
+        for (j = i; j < num_parts - 1; j++)
+        {
+            stu[j] = stu[j + 1];
+        }
+        num_parts--;
+        printf("删除成功");
+    }
+}
+
+//读取
+void read_data(void)
+{
+    puts("读取数据");
+    printf("请输入文件名");
+    char filename[256];
+    scanf("%s", filename);
+
+    FILE *fp = fopen(filename, "r");
+    if (fp == NULL)
+    {
+        perror(filename);
+        return;
+    }
+    int i = 0;
+    while (fscanf(fp, "%d,%[^,],%d", &stu[i].number, stu[i].name, &stu[i].score) == 3)
+    {
+        i++;
+    }
+    fclose(fp);
+    num_parts = i;
+    printf("读取 %d 记录\n", num_parts);
+}
+
+//保存
+void save_data(void)
+{
+    puts("保存数据");
+    printf(" 请输入文件名");
+    char filename[256];
+    scanf("%s", filename);
+    FILE *fp = fopen(filename, "r");
+    if (fp == NULL)
+    {
+        perror(filename);
+        return;
+    }
+    for (int i = 0; i < num_parts; i++)
+    {
+        fprintf(fp, "%d,%s,%d\n", stu[i].number, stu[i].name, stu[i].score);
+    }
+    fclose(fp);
+    printf("保存%d 成功", num_parts);
+}
+
+//排序
+void sort_data(void)
+{
+    printf("排序\n");
+    for (int i = 0; i < num_parts; i++)
+    {
+        int change = 0;
+        static struct students t;
+        for (int j = 0; j < num_parts - i - 1; j++)
+        {
+            if (stu[j].number > stu[j + 1].number)
+            {
+                t = stu[j + 1];
+                stu[j + 1] = stu[j];
+                stu[j] = t;
+                change = 1;
+            }
+        }
+        if (!change)
+            break;
+    }
+    for (int i = 0; i < num_parts; i++)
+    {
+        int change = 0;
+        static struct students t;
+        for (int j = 0; j < num_parts - i - 1; j++)
+        {
+            if (stu[j].score > stu[j + 1].score)
+            {
+                t = stu[j + 1];
+                stu[j + 1] = stu[j];
+                stu[j] = t;
+                change = 1;
+            }
+        }
+        if (!change)
+            break;
+    }
+    printf("排序已完成");
+}
+
+//图表
+void make_chart(void)
+{
+    printf("NUMBER  |  NAME                score\n");
+    for (int i = 0; i < num_parts; i++)
+    {
+        printf("%d  |  %s ", stu[i].number, stu[i].name);
+        for (int j = 0; j < stu[i].score; j++)
+        {
+            printf("*");
+        }
+        printf("\n");
+    }
+    printf("图表\n");
+}
+
+int confirm(const char *msg)
+{
+    char c = 'n';                // 默认选择是 no
+    printf("%s(Y/N): ", msg);    // 提示输入 yes/no 进行确认
+    scanf(" %c%*[^\n]", &c);     // 读取第一个字符，忽略剩余字符
+    return c == 'y' || c == 'Y'; // 返回确认结果
+}

src/data.c

@@ -0,0 +1,291 @@
+#define NAME_LEN 31
+#define MAX_PARTS 100
+
+struct students
+{
+    int number;
+    char name[NAME_LEN + 1];
+    int score;
+};
+static struct students stu[MAX_PARTS];
+static int num_parts = 0;
+#include <stdio.h>
+#include <stdlib.h>
+
+//定义常量
+#define CMD_QUIT 0
+#define CMD_QUERY 4
+#define CMD_INSERT 5
+#define CMD_UPDATE 6
+#define CMD_DELETE 7
+#define CMD_READ 1
+#define CMD_SAVE 2
+#define CMD_PRINT 3
+#define CMD_SORT 8
+#define CMD_CHART 9
+
+// 函数定义
+void init(void)
+{
+    puts("程序启动");
+}
+void quit(void)
+{
+    puts("程序退出");
+    exit(EXIT_SUCCESS);
+}
+void display_menu(void)
+{
+    printf("\n%d 读取 | %d 保存 | %d 打印 | %d 查询 | %d 添加\n%d 修改 | %d 删除 | %d 排序 | %d 图表 | %d 退出\n\n", CMD_READ, CMD_SAVE, CMD_PRINT, CMD_QUERY, CMD_INSERT, CMD_UPDATE, CMD_DELETE, CMD_SORT, CMD_CHART, CMD_QUIT);
+}
+int make_choice(void)
+{
+    int c;     // 用户输入
+    int n = 0; // 正确读入的数据项个数
+    while (n == 0)
+    {
+        printf("请选择：");
+        n = scanf("%d", &c); // 尝试读入整数 c
+        scanf("%*[^\n]");    // 跳过一行中剩余的字符
+    }
+    return c;
+}
+
+//查询
+void query_data(void)
+{
+    int num;
+    printf("输入学生学号： ");
+    scanf("%d", &num);
+    int f = -1;
+    for (int i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = i;
+            break;
+        }
+    }
+    if (f == -1)
+    {
+        printf("学生不存在");
+    }
+    else
+    {
+        printf("学生学号：%d\n", stu[f].number);
+        printf("学生姓名：%s\n", stu[f].name);
+        printf("学生成绩：%d\n", stu[f].score);
+    }
+}
+
+//打印
+void print_data(void)
+{
+    printf("NUMBER  |  NAME                score\n");
+    for (int i = 0; i < num_parts; i++)
+    {
+        printf("%d  |  %s                    %d\n", stu[i].number, stu[i].name, stu[i].score);
+    }
+}
+
+//添加
+void add_data(void)
+{
+    int num;
+    printf("输入学生学号：");
+    scanf("%d", &num);
+    int f = 0;
+    for (int i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = 1;
+            break;
+        }
+    }
+    if (f == 0)
+    {
+        stu[num_parts].number = num;
+        printf("输入学生姓名：");
+        scanf("%s", &stu[num_parts].name);
+        printf("输入学生成绩：");
+        scanf("%d", &stu[num_parts].score);
+        num_parts++;
+        printf("学生 %d 添加成功\n", num);
+    }
+    else
+    {
+        printf("学生已存在");
+    }
+}
+
+//修改
+void update_data(void)
+{
+    int num;
+    printf("输入学生学号：");
+    scanf("%d", &num);
+    int f = 0;
+    for (int i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = 1;
+            break;
+        }
+    }
+    if (f == 0)
+    {
+        printf("学生不存在");
+    }
+    else
+    {
+        printf("输入学生学号：");
+        scanf("%d", &stu[num].number);
+        printf("输入学生姓名：");
+        scanf("%s", stu[num].name);
+        printf("输入学生成绩：");
+        scanf("%d", &stu[num].score);
+        printf("学生 %d 已更新", num);
+    }
+}
+
+//删除
+void delete_data(void)
+{
+    int num;
+    printf("输入学生学号：");
+    scanf("%d", &num);
+    int f = 0, i, j;
+    for (i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = 1;
+            break;
+        }
+    }
+    if (f == 0)
+    {
+        printf("学生不存在");
+    }
+    else
+    {
+        for (j = i; j < num_parts - 1; j++)
+        {
+            stu[j] = stu[j + 1];
+        }
+        num_parts--;
+        printf("删除成功");
+    }
+}
+
+//读取
+void read_data(void)
+{
+    puts("读取数据");
+    printf("请输入文件名");
+    char filename[256];
+    scanf("%s", filename);
+
+    FILE *fp = fopen(filename, "r");
+    if (fp == NULL)
+    {
+        perror(filename);
+        return;
+    }
+    int i = 0;
+    while (fscanf(fp, "%d,%[^,],%d", &stu[i].number, stu[i].name, &stu[i].score) == 3)
+    {
+        i++;
+    }
+    fclose(fp);
+    num_parts = i;
+    printf("读取 %d 记录\n", num_parts);
+}
+
+//保存
+void save_data(void)
+{
+    puts("保存数据");
+    printf(" 请输入文件名");
+    char filename[256];
+    scanf("%s", filename);
+    FILE *fp = fopen(filename, "r");
+    if (fp == NULL)
+    {
+        perror(filename);
+        return;
+    }
+    for (int i = 0; i < num_parts; i++)
+    {
+        fprintf(fp, "%d,%s,%d\n", stu[i].number, stu[i].name, stu[i].score);
+    }
+    fclose(fp);
+    printf("保存%d 成功", num_parts);
+}
+
+//排序
+void sort_data(void)
+{
+    printf("排序\n");
+    for (int i = 0; i < num_parts; i++)
+    {
+        int change = 0;
+        static struct students t;
+        for (int j = 0; j < num_parts - i - 1; j++)
+        {
+            if (stu[j].number > stu[j + 1].number)
+            {
+                t = stu[j + 1];
+                stu[j + 1] = stu[j];
+                stu[j] = t;
+                change = 1;
+            }
+        }
+        if (!change)
+            break;
+    }
+    for (int i = 0; i < num_parts; i++)
+    {
+        int change = 0;
+        static struct students t;
+        for (int j = 0; j < num_parts - i - 1; j++)
+        {
+            if (stu[j].score > stu[j + 1].score)
+            {
+                t = stu[j + 1];
+                stu[j + 1] = stu[j];
+                stu[j] = t;
+                change = 1;
+            }
+        }
+        if (!change)
+            break;
+    }
+    printf("排序已完成");
+}
+
+//图表
+void make_chart(void)
+{
+    printf("NUMBER  |  NAME                score\n");
+    for (int i = 0; i < num_parts; i++)
+    {
+        printf("%d  |  %s ", stu[i].number, stu[i].name);
+        for (int j = 0; j < stu[i].score; j++)
+        {
+            printf("*");
+        }
+        printf("\n");
+    }
+    printf("图表\n");
+}
+
+int confirm(const char *msg)
+{
+    char c = 'n';                // 默认选择是 no
+    printf("%s(Y/N): ", msg);    // 提示输入 yes/no 进行确认
+    scanf(" %c%*[^\n]", &c);     // 读取第一个字符，忽略剩余字符
+    return c == 'y' || c == 'Y'; // 返回确认结果
+}

src/data.h

@@ -0,0 +1,19 @@
+#define NAME_LEN 31
+#define MAX_PARTS 100
+
+
+// 函数声明
+void init(void);
+void quit(void);
+void display_menu(void);
+int make_choice(void);
+void read_data(void);   // 读取
+void save_data(void);   // 保存
+void print_data(void);  // 打印
+void query_data(void);  // 查询
+void add_data(void);    // 添加
+void update_data(void); // 修改
+void delete_data(void); // 删除
+void sort_data(void);   // 排序
+void make_chart(void);  // 图表
+int confirm(const char *msg);