Update README.md

31 changed files with 4465 additions and 1 deletions
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@ -0,0 +1,5 @@
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+    "files.associations": {
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+    }
+}
--- a/0.drawio.svg
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+            </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;">
+                                SearchbyNum
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="264" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    SearchbyNum
+                </text>
+            </switch>
+        </g>
+        <path d="M 210 420 L 146.37 419.55" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 141.12 419.51 L 148.14 416.06 L 146.37 419.55 L 148.09 423.06 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="20" 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: 21px;">
+                        <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;">
+                                SearchbyName
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="80" y="424" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    SearchbyName
+                </text>
+            </switch>
+        </g>
+        <rect x="20" y="570" 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: 600px; margin-left: 21px;">
+                        <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;">
+                                PrintScore
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="80" y="604" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    PrintScore
+                </text>
+            </switch>
+        </g>
+        <rect x="10" y="480" 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: 510px; 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;">
+                                StatisticAnalysis
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="70" y="514" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    StatisticAnalysis
+                </text>
+            </switch>
+        </g>
+        <path d="M 203.6 87.32 L 156.37 88.43" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 151.12 88.56 L 158.03 84.89 L 156.37 88.43 L 158.2 91.89 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 206.8 526.88 L 136.37 525.16" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 131.12 525.03 L 138.2 521.7 L 136.37 525.16 L 138.03 528.7 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <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;">
+                                WritetoFile
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="344" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    WritetoFile
+                </text>
+            </switch>
+        </g>
+        <path d="M 204.4 338.92 L 126.37 339.5" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 121.12 339.54 L 128.09 335.99 L 126.37 339.5 L 128.14 342.99 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="10" y="670" 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: 700px; 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;">
+                                ReadfromFile
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="70" y="704" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    ReadfromFile
+                </text>
+            </switch>
+        </g>
+        <path d="M 205.2 703 L 136.37 703" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 131.12 703 L 138.12 699.5 L 136.37 703 L 138.12 706.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 442.01 53.88 L 523.63 54.92" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 528.88 54.99 L 521.84 58.4 L 523.63 54.92 L 521.93 51.4 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>
--- a/1.drawio.svg
+++ b/1.drawio.svg
@ -0,0 +1,108 @@
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="181px" height="671px" viewBox="-0.5 -0.5 181 671" content="&lt;mxfile&gt;&lt;diagram id=&quot;jo-ijJKzn8aEHSbM58f8&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+    <defs/>
+    <g>
+        <path d="M 90 80 L 90 143.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 90 148.88 L 86.5 141.88 L 90 143.63 L 93.5 141.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <ellipse cx="90" 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: 31px;">
+                        <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="90" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    main
+                </text>
+            </switch>
+        </g>
+        <path d="M 90 210 L 90 273.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 90 278.88 L 86.5 271.88 L 90 273.63 L 93.5 271.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="30" 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: 31px;">
+                        <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;">
+                                ReadScore
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="90" y="184" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    ReadScore
+                </text>
+            </switch>
+        </g>
+        <path d="M 90 340 L 90 403.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 90 408.88 L 86.5 401.88 L 90 403.63 L 93.5 401.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="30" y="280" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 42 280 L 42 340 M 138 280 L 138 340" 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: 94px; height: 1px; padding-top: 310px; margin-left: 43px;">
+                        <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;">
+                                输入学生的学号，姓名，成绩
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="90" y="314" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入学生的学号，姓名，成绩
+                </text>
+            </switch>
+        </g>
+        <path d="M 90 510 L 90 603.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 90 608.88 L 86.5 601.88 L 90 603.63 L 93.5 601.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 0 510 L 20 410 L 180 410 L 160 510 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: 178px; height: 1px; padding-top: 460px; 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;">
+                                输入n个学生的学号，姓名
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="90" y="464" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入n个学生的学号，姓名
+                </text>
+            </switch>
+        </g>
+        <rect x="30" y="610" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 42 610 L 42 670 M 138 610 L 138 670" 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: 94px; height: 1px; padding-top: 640px; margin-left: 43px;">
+                        <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m门课程的成绩
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="90" y="644" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入m门课程的成绩
+                </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>
--- a/2.drawio.svg
+++ b/2.drawio.svg
@ -0,0 +1,147 @@
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="498px" height="721px" viewBox="-0.5 -0.5 498 721" content="&lt;mxfile&gt;&lt;diagram id=&quot;B6Nd2Qj-oxOwm7tJk0uP&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+    <defs/>
+    <g>
+        <path d="M 157 80 L 157 133.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
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+        <ellipse cx="157" 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: 98px;">
+                        <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="157" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
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+                </text>
+            </switch>
+        </g>
+        <path d="M 157 200 L 157 273.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 157 278.88 L 153.5 271.88 L 157 273.63 L 160.5 271.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
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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: 148px; height: 1px; padding-top: 170px; margin-left: 83px;">
+                        <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;">
+                                AverSumofEveryCourse
+                            </div>
+                        </div>
+                    </div>
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+                <text x="157" y="174" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    AverSumofEveryCourse
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+            </switch>
+        </g>
+        <path d="M 157 370 L 157 453.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 157 458.88 L 153.5 451.88 L 157 453.63 L 160.5 451.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 72 370 L 92 280 L 242 280 L 222 370 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: 325px; margin-left: 73px;">
+                        <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;">
+                                输入学生成绩
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="157" y="329" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入学生成绩
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+        </g>
+        <path d="M 156.51 550 L 155.39 653.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 155.34 658.88 L 151.91 651.84 L 155.39 653.63 L 158.91 651.92 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="87" y="460" width="140" height="90" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 101 460 L 101 550 M 213 460 L 213 550" 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: 110px; height: 1px; padding-top: 505px; margin-left: 102px;">
+                        <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;">
+                                将学生的成绩相加
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="157" y="509" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
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+                </text>
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+        </g>
+        <path d="M 215 689.45 L 368.59 688.06" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 373.84 688.01 L 366.87 691.57 L 368.59 688.06 L 366.81 684.57 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 95 690 L 17 690 Q 7 690 7 680 L 7 335 Q 7 325 17 325 L 75.63 325" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 80.88 325 L 73.88 328.5 L 75.63 325 L 73.88 321.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="95" y="660" 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: 690px; margin-left: 96px;">
+                        <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;">
+                                总分/学生人数
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="155" y="694" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    总分/学生人数
+                </text>
+            </switch>
+        </g>
+        <path d="M 227 504.5 L 353.83 504.87" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 359.08 504.89 L 352.07 508.37 L 353.83 504.87 L 352.09 501.37 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <ellipse cx="427" cy="510" 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: 510px; margin-left: 368px;">
+                        <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;">
+                                输出课程总分
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="427" y="514" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输出课程总分
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+            </switch>
+        </g>
+        <ellipse cx="437" cy="680" 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: 680px; margin-left: 378px;">
+                        <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;">
+                                输出课程平均值
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="437" y="684" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输出课程平均值
+                </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>
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+        <ellipse cx="235" 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: 176px;">
+                        <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>
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+        <path d="M 235 230 L 235 303.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
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+                <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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+                                AverSumofEveryCourse
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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;">
+                                第i门课程
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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: 178px; height: 1px; padding-top: 559px; margin-left: 151px;">
+                        <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;">
+                                将学生的第i门课程进行相加
+                            </div>
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+                <text x="240" y="563" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    将学生的第i门课程进行相加
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+        </g>
+        <rect x="440" y="550" 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: 580px; margin-left: 441px;">
+                        <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;">
+                                输出第i门课程的总分
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="500" y="584" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输出第i门课程的总分
+                </text>
+            </switch>
+        </g>
+        <path d="M 350.17 804.08 L 458.63 803.18" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 463.88 803.13 L 456.91 806.69 L 458.63 803.18 L 456.85 799.69 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 120 860 L 140 750 L 360 750 L 340 860 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: 238px; height: 1px; padding-top: 805px; margin-left: 121px;">
+                        <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;">
+                                总分/人数
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="240" y="809" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    总分/人数
+                </text>
+            </switch>
+        </g>
+        <rect x="465" y="775" width="150" height="55" 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: 148px; height: 1px; padding-top: 803px; margin-left: 466px;">
+                        <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;">
+                                输出第i门课程的平均值
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="540" y="806" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输出第i门课程的平均值
+                </text>
+            </switch>
+        </g>
+        <path d="M 130 805 L 95 805 Q 85 805 84.96 795 L 84.15 598.25" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 85 600 L 95 600 L 95 350 L 142.13 350" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 148.88 350 L 139.88 354.5 L 142.13 350 L 139.88 345.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 0 585 L 75 541.7 L 150 585 L 75 628.3 L 0 585 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: 585px; 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;">
+                                if i&lt;=m
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="75" y="589" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    if i&lt;=m
+                </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>
--- a/README.md
+++ b/README.md
@ -42,3 +42,459 @@
 菜单驱动的命令行交互界面
 需求分析
 分析系统的功能需求和界面需求，编制用户手册如下。
+
+
+C1: 启动程序
+命令行中执行命令./app,系统启动，显示提示信息，然后显示功能菜单，等待用户输入命令。
+````
+学生成绩管理
+1 输入分数
+2 计算每个学生各门成绩的总分和平均分
+3 计算每个课程的总分和平均分
+4 按分数降序排序
+5 按分数升序排序
+6 按数据升序排序
+7 按姓名的字典顺序排序
+8 查找数据
+9 查找姓名
+10 统计分析
+11 列表记录
+12 写入文件
+13 读取文件
+0 退出
+请输入你的选择：
+````
+C2: 显示命令菜单
+调用 Menu() 函数显示命令菜单，用户输入选项后，将结果返回主函数
+````
+学生成绩管理
+1 输入分数
+2 计算每个学生各门成绩的总分和平均分
+3 计算每个课程的总分和平均分
+4 按分数降序排序
+5 按分数升序排序
+6 按数据升序排序
+7 按姓名的字典顺序排序
+8 查找数据
+9 查找姓名
+10 统计分析
+11 列表记录
+12 写入文件
+13 读取文件
+0 退出
+请输入你的选择：
+````
+   
+C3: 退出程序
+选择菜单命令 0 ，再输入 y 确认，则退出程序。
+````
+请输入你的选择: 0
+你确定你想进入吗?(确定/不确定): 确定
+结束程序!
+````
+
+C4: 添加学生信息
+选择菜单命令 1 ，假设n=4,m=3,提示输入学生的学号，姓名和成绩，然后利用循环逐个输入学生的学号和姓名以及各科成绩。
+````
+请输入你的选择：1
+输入学生的学号，名字和成绩：
+2214111018 李玉璇 100 95 86
+2214111038 张桐桐 77 89 99
+2214111026 孟婷玉 85 91 98
+2214111022 周羽凡 75 89 100
+````
+
+C5: 计算学生各门课程总分和平均分
+选择菜单命令 2 ，计算学生各门课程总分和平均分,然后利用循环逐个输出学生的顺序，总成绩和平均分，结果都取整数。
+````
+请输入你的选择：2
+学生 李玉璇： 总分 = 281， 平均分 = 93
+学生 张桐桐： 总分 = 265， 平均分 = 88
+学生 孟婷玉： 总分 = 274， 平均分 = 91
+学生 周羽凡： 总分 = 264， 平均分 = 88
+````
+
+c6:计算每门课程的总分和平均分
+选择菜单命令 3，计算每门课程的总分和平均分，然后利用循环逐个输出每门课程的总分和平均分，结果都取整数。
+````
+请输入你的选择： 3
+课程 1： 总分 = 337， 平均分 = 84
+课程 2： 总分 = 364， 平均分 = 91
+课程 3： 总分 = 383， 平均分 = 95
+````
+
+c7：学生总分排序
+ 如果a < b,则按升序排序。 选择菜单命令 4，按选择法将数组sum的元素值按升序进行排序，显示提示信息，最后打印出学生信息。
+ 如果a > b，则按降序排序。选择菜单命令 5，按选择法将数组sum的元素值按降序进行排序，显示提示信息，最后打印出学生成绩。
+````
+ 请输入你的选择： 4
+ 按分数降序排序：
+ 2214111038 ZhangTongtong 100 95 86 281 93
+ 2214111018 LiYuxuan 85 91 98 274 91
+ 2214111026 MengTingyu 77 89 99 265 88
+ 2214111022 ZhouYufan 75 89 100 264 88
+ 请输入你的选择： 5
+ 按分数升序排列：
+ 2214111022 ZhouYufan 75 89 100 264 88
+ 2214111026 MengTingyu 77 89 99 265 88
+ 2214111018 LiYuxuan 85 91 98 274 91
+ 2214111038 ZhangTongtong 100 95 86 281 93
+ ````
+
+ c8：学号顺序排序
+ 选择菜单命令 6，按学号从小到大进行排序，显示提示信息，最后打印学生信息。
+````
+请输入你的选择： 6
+按学号降序排列：
+2214111018 LiYuxuan 85 91 98 274 91
+2214111022 ZhouYufan 75 89 100 264 88
+2214111026 MengTingyu 77 89 99 265 88 
+2214111038 ZhangTongtong 100 95 86 281 93
+````
+
+C9: 姓名顺序排序
+选择菜单命令 7 ，按姓名的字典顺序进行排序，显示提示信息，最后打印学生信息。
+````
+请输入你的选择: 7
+按名称按字典顺序排序:
+2214111018 LiYuxuan 75 89 100 264 88
+2214111022 ZhouYufan 77 89 99 265 88
+2214111026 MengTingyu 100 95 86 281 93
+2214111038 ZhangTongtong 85 91 98 274 91
+````
+
+C10: 学生信息查询
+选择菜单命令 8 ，提示输入学生学号，若该学号存在，则输出学生信息；否则提示没有找到并结束。
+````
+请输入你的选择: 8
+输入你想搜寻的学号:2214111018
+2214111018 LiYuxuan 75 89 100 264 88
+1 输入成绩
+2 计算每门课程的总分和平均分
+3 计算每名学生的总分和平均分
+4 按分数降序排序
+5 按分数升序排序
+6 按学号升序排序
+7 按名称按字典顺序排序
+8 按数字搜索
+9 按名字搜索
+10 统计分析
+11 列表记录
+12 写一个文件
+13 从文件中读取
+0  退出
+请输入你的选择: 8
+输入你想搜寻的学号:2214111001
+没有找到!
+选择菜单命令 9 ，提示输入学生姓名，若该姓名存在，则输出学生信息；否则提示没有找到并结束。
+请输入你的选择: 9
+输入你想搜寻的名字:ZhangTongtong
+2214111038 ZhangTongtong 85 91 98 274 91
+1 输入分数
+2 计算每门课程的总分和平均分
+3 计算每名学生的总分和平均分
+4 按分数降序排序
+5 按分数升序排序
+6 按学号升序排序
+7 按名称按字典顺序排序
+8 通过学号搜索
+9 通过姓名搜素
+10 统计分析
+11 列表记录
+12 写一个文件
+13 从文件中读取
+0  退出
+请输入你的选择: 9
+请输入你想搜索的名字:GuoJiahui
+Not found!
+````
+
+C11: 统计各分数段学生人数及所占百分比
+选择菜单命令 10，提示输入学生成绩，通过循环得出各分数段学生人数及所占百分比
+````
+请输入你的选择: 10
+关于课程1:
+<60 0 0.00%
+60-70 0 0.00%
+70-80 2 50.00%
+80-90 1 25.00%
+90-100 0 0.00%
+100 1 25.00%
+For course 2:
+<60 0 0.00%
+60-70 0 0.00%
+70-80 0 00.00%
+80-90 2 50.00%
+90-100 2 50.00%
+100 0 0.00%
+For course 3:
+<60 0 0.00%
+60-70 0 0.00%
+70-80 0 0.00%
+80-90 1 25.00%
+90-100 2 50.00%
+100 1 25.00%
+````
+
+C12: 打印学生信息
+选择菜单命令11，打印
+````
+请输入你的选择：11
+2214111018 李玉璇 100 95 86 281 93
+2214111038 张桐桐 77 89 99 265 88
+2214111026 孟婷玉 85 91 98 274 91
+2214111022 周羽凡 75 89 100 264 88
+````
+
+C13: 将学生信息保存在文件中
+选择菜单命令 12 ，将学生信息保存在文件 student.txt 中。如果文件不存在，则给出错误信息并退出程序，否则逐个读入
+````
+请输入你的选择：12
+未能打开你的成绩！
+1 输入成绩
+2 计算所有课程的总分和平均值
+3 计算所有学生的总分和平均值
+4 按分数降序排列
+5 按分数升序排列
+6 按数字升序排列
+7 按名字字母排列
+8 按数字搜索
+9 按名字搜索
+10 统计分析
+11 列表记录
+12 写入文件
+13 从文件中读取
+0 退出
+请输入你的选择：12
+2214111018 李玉璇 100 95 86 281 93
+2214111038 张桐桐 77 89 99 265 88
+2214111026 孟婷玉 85 91 98 274 91
+2214111022 周羽凡 75 89 100 264 88
+````
+
+C14：从文件中读取学生信息
+选择菜单命令 13 ，从文件中读取学生的学号、姓名及成绩等信息写入到结构体数组 stu 中。如果文件为空，则给出错误信息并退出程序，反之，逐个读入
+````
+请输入你的选择：13
+未能打开你的成绩！
+1 输入成绩
+2 计算所有课程的总分和平均值
+3 计算所有学生的总分和平均值
+4 按分数降序排列
+5 按分数升序排列
+6 按数字升序排列
+7 按名字字母排列
+8 按数字搜索
+9 按名字搜索
+10 统计分析
+11 列表记录
+12 写入文件
+13 从文件中读取
+0 退出
+请输入你的选择：12
+2214111018 李玉璇 100 95 86 281 93
+2214111038 张桐桐 77 89 99 265 88
+2214111026 孟婷玉 85 91 98 274 91
+2214111022 周羽凡 75 89 100 264 88
+````
+
+# 概要设计
+系统主要分为用户界面和数据处理两大模块。
+用户界面模块包括输入学生成绩（ReadScore）、计算学生总分和平均分（AverSumofEveryStudent）、计算总分和平均分（AverSumofEveryCourse）、按选择发将数组元素排序（Sortbyscore）、使数据按升序排序（Ascending）、使数据按降序排序（Descending）、交换单精度浮点数据（SwapFloat）、交换长整型数据（SwapLong）、交字符串（SwapChar）、按选择法将数组元素按从低到高排序、交换实现字符串按字典顺序排序（SortbyName）、按学号查找学生成绩并显示查找结果SearchbyNum）、按姓名的字典顺序排出成绩表 、统计各分数段的学生人数及所占的百分比 、打印学生成绩 、输出学生的学号、姓名及课程的成绩到文件student.txt中 、从文件中读取学生的学号、姓名及成绩等信息写入到结构体数组stu中
+
+上述各模块通过主程序（main）进行调用，系统模块图如下。
+![添加库存记录流程图](0.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。
+
+ReadScore
+输入n个学生的m门课成绩
+
+AverSumofEveryStudent
+计算每个学生各门课程的总分和平均分 
+
+AverSumofEveryCourse
+计算每门课程的总分和平均分
+
+SortbyScore
+按选择法将数组sum的元素值排序
+
+Ascending
+使数据按升序排序
+
+Descending
+使数据按降序排序
+
+SwapFloat
+交换两个单精度浮点型数据
+
+SwapLong
+交换两个长整型数据
+
+SwapChar
+交换两个字符串 
+
+AsSortbyNum
+按选择法将数组num的元素值按从低到高排序
+
+AsSortbyNum
+交换法实现字符串按字典顺序排序 
+
+SearchbyNum
+按学号查找学生成绩并显示查找结果 
+
+SearchbyName
+按姓名的字典顺序排出成绩表
+
+StatisticAnalysis
+统计各分数段的学生人数及所占的百分比 
+
+PrintScore
+打印学生成绩 
+
+WritetoFile
+输出n个学生的学号、姓名及m门课程的成绩到文件student.txt中
+
+ReadfromFile
+从文件中读取学生的学号、姓名及成绩等信息写入到结构体数组stu中
+
+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相应的操作,
+Step 2.1:显示菜单,
+Step 2.2:选择菜单命令 c,
+Step 2.3:if c == 1 then ReadScore,
+Step 2.4:if c == 2 then AverSumofEveryStudent,
+Step 2.5:if c == 3 then AverSumofEveryCourse,
+Step 2.6:if c == 4 then SortbyScore(Descending),
+Step 2.7:if c == 5 then SortbyScore(Ascending),
+Step 2.8:if c == 6 then AsSortbyNum,
+Step 2.9:if c == 7 then SortbyName,
+Step 2.10:if c == 8 then SearchbyNum,
+Step 2.11:if c == 9 then SearchbyName,
+Step 2.12:if c == 10 then StatisticAnalysis,
+Step 2.13:if c == 11 then PrintScore,
+Step 2.14:if c == 12 then WritetoFile,
+Step 2.15:if c == 13 then ReadfromFile,
+Step 2.16:if c == 0 then exit,
+## 详细设计
+![系统模块图](xitong.drawio.svg)
+
+````
+1·输入n个学生的m门课成绩
+ReadScore
+Step 1:显示提示信息，要求输入学生的学号，姓名和成绩
+Step 2：利用循环，输入学生的学号，成绩和各科成绩
+````
+![n个学生的m门课成绩](1.drawio.svg)
+````
+2·计算每个学生各门课程的总分和平均分 
+AverSumofEveryStudent
+step1输入一门学生的成绩
+step2将学生成绩相加，输出总分
+step3输出课程平均值
+step4输入下一门课程
+````
+![总分平均值](2.drawio.svg)
+````
+3·计算每门课程的总分和平均分 
+AverSumofEveryCourse
+step1输入第一门课程的所有学生的成绩
+step2将成绩相加，输出科目总分
+step3总分/人数，输出课程平均分
+step4输入下一个科目
+````
+![课程总分平均分](3.drawio.svg)
+
+````
+4·按选择法将数组sum的元素值排序 
+SortbyScore
+Step 1:利用循环将i赋值给k
+Step 2:用循环从i+1到n-1比较,将较小的赋给k
+Step 3:如果k与i不相等，每一课的成绩交换，总分，平均分，学号，姓名依次交换
+````
+![lyx4](c4.drawio.svg)
+
+
+5.按选择法将数组num的元素值按从低到高排序 
+````
+Step 1:利用 for 循环给 i 赋值为0
+Step 2:利用 if 条件判断学号是否致
+Step 3:利用二次循环找出所有符合条件件的学
+Step 4:利用 i 件语句能否找到该学生
+````
+![排序1](mty5.drawio.svg)
+
+6.交换法实现字符串按字典顺序排序 
+````
+step 1:利用for循环将相邻的两个姓名作比较
+step 2:如果前一个字符串大于后一个，利用for循环交换m门课程的成绩
+step 3:依次交换
+````
+![排序2](mty6.drawio.svg)
+
+7.按学号查找学生成绩并显示查找结果
+````
+Step 1:利用for循环给i赋值为0
+Step 2:利用if条件判断学号是否一致
+Step 3:利用二次循环找出所有符合条件的学生
+Step 4：利用if条件语句能否找到该学生
+````
+![查找](mty7.drawio.svg)
+
+8.按姓名的字典顺序排出成绩表 
+````
+Step 1:利用for循环给i赋值为0
+Step 2:利用of条件语句和循环判断是否此学生并显示结果
+````
+![排序3](mty.8.drawio.svg)
+
+9·统计各分数段的学生人数及所占的百分比
+````
+StatisticAnalysis
+step1:输入每个学生的成绩
+step2:判断输入成绩所在的分数段
+step3:将各个分数段的成绩个数除以学生总人数并乘以百分百
+````
+![统计](c9.drawio.svg)
+
+10·打印学生成绩 
+````
+PrintScore
+step1:输入学生的学号,姓名.
+step2:查找该学生的成绩
+step3:输出该学生的成绩
+````
+![打印](c10.drawio.svg)
+
+11·输出n个学生的学号、姓名及m门课程的成绩到文件student.txt中 
+````
+WritetoFile
+step1:输入学生的学号和姓名
+step2:查找该学生的所有课程成绩
+step3:将成绩保存到文件student.txt中
+````
+![文件](c11.drawio.svg)
+
+12·从文件中读取学生的学号、姓名及成绩等信息写入到结构体数组stu中
+````
+ReadfromFile
+step1:查找文件
+step2:从文件中读取学生的学号姓名成绩
+step3:将信息写入到数组stu中
+````
+![stu](c12.drawio.svg)
+# 总结思考
+张桐桐
+在这次项目的活动中，我体会到了团队合作的高效和包容，利用看板去分配任务，将一个大项目分成多个大问题，然后再把大问题分成一个一个的小问题，每完成一个小问题都在向目标前进一步，不仅降低了难度也提高了组员们自信和成就感。将每个任务分配到个人，不仅赋予使命，也有其他成员对其进行测试，让每个分支任务可以更好的进行。本次团队合作让我认识到作为一个管理者需要一个对问题的大局观念，如何去分配任务，如何去与队友进行有效的沟通，如何把控项目的进度，这些都让我在此次项目中学到很多。
+李玉璇
+通过本次项目，我学到了团队合作的重要性，知道了团队之间合作完成一个项目的过程是需要配合和分工，通过分工将大的工作分成细小的模块，在看板上呈现出一个个任务点的进行，让我有种提前进入工作的感受。在以后的工作当中这也是不可缺少的一部分，这也给我了一种全新的体验。与团队的沟通也是极其重要的，每个人都对自己的任务部分负责，让进度更好的往下一步进行，使得任务更快的完成。我在这个项目不仅仅时学会了工作中的合作更多的还是对分配的任务进行较好的处理，提高了效率和责任感，这是一次有意义有收获的项目合作活动。
+
+
+周羽凡
+完成了这次的项目活动，我感受到了合作的魅力，将一项任务划分给不同的成员，各个组员分配到各自擅长的事物，不仅大大提高了项目的完成速度，也提高了每个人的自信心，而且遇到困难的问题是，大家还可以相互探讨，相互取长补短，一起攻破难题。而且，我们还将各自的任务划分的很细致，每完成一个都会有小小的成就感。也让我体会到了分工合作的意义，让我受益匪浅。希望我们也能在从中找出我们的不足并加以改进，让我们的整体实力更上一层楼，同时也为我以后的项目合作打下基础。
--- a/44
+++ b/44
@ -0,0 +1,44 @@
+C10: 学生信息查询
+选择菜单命令 8 ，提示输入学生学号，若该学号存在，则输出学生信息；否则提示没有找到并结束。
+
+请输入你的选择: 8
+输入你想搜寻的学号:2214111018
+2214111018 LiYuxuan 75 89 100 264 88
+1 输入成绩
+2 计算每门课程的总分和平均分
+3 计算每名学生的总分和平均分
+4 按分数降序排序
+5 按分数升序排序
+6 按学号升序排序
+7 按名称按字典顺序排序
+8 按数字搜索
+9 按名字搜索
+10 统计分析
+11 列表记录
+12 写一个文件
+13 从文件中读取
+0  退出
+请输入你的选择: 8
+输入你想搜寻的学号:2214111001
+没有找到!
+选择菜单命令 9 ，提示输入学生姓名，若该姓名存在，则输出学生信息；否则提示没有找到并结束。
+请输入你的选择: 9
+输入你想搜寻的名字:ZhangTongtong
+2214111038 ZhangTongtong 85 91 98 274 91
+1 输入分数
+2 计算每门课程的总分和平均分
+3 计算每名学生的总分和平均分
+4 按分数降序排序
+5 按分数升序排序
+6 按学号升序排序
+7 按名称按字典顺序排序
+8 通过学号搜索
+9 通过姓名搜素
+10 统计分析
+11 列表记录
+12 写一个文件
+13 从文件中读取
+0  退出
+请输入你的选择: 9
+请输入你想搜索的名字:GuoJiahui
+Not found!
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+        <ellipse cx="260" cy="40" rx="40" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
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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;">
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+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
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+                                main
+                            </div>
+                        </div>
+                    </div>
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+                <text x="260" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    main
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+        </g>
+        <path d="M 260 230 L 260 303.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 260 308.88 L 256.5 301.88 L 260 303.63 L 263.5 301.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="200" y="170" 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: 200px; 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;">
+                                输入学生的学号和姓名
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="260" y="204" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入学生的学号和姓名
+                </text>
+            </switch>
+        </g>
+        <path d="M 260 370 L 260 443.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 260 448.88 L 256.5 441.88 L 260 443.63 L 263.5 441.88 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;">
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+                        <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;">
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+                                Y
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="260" y="413" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <path d="M 200 340 L 50 340 Q 40 340 40 350 L 40 433.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 40 438.88 L 36.5 431.88 L 40 433.63 L 43.5 431.88 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: 340px; margin-left: 70px;">
+                        <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="70" y="343" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    N
+                </text>
+            </switch>
+        </g>
+        <rect x="200" y="310" width="120" height="60" rx="9" ry="9" 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: 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;">
+                                能找到该学号
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="260" y="344" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    能找到该学号
+                </text>
+            </switch>
+        </g>
+        <path d="M 260 510 L 260 613.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 260 618.88 L 256.5 611.88 L 260 613.63 L 263.5 611.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 250 510 L 210 510 Q 200 510 203.16 500.51 L 216.84 459.49 Q 220 450 230 450 L 310 450 Q 320 450 316.84 459.49 L 303.16 500.51 Q 300 510 290 510 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: 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;">
+                                输出其成绩
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="260" y="484" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输出其成绩
+                </text>
+            </switch>
+        </g>
+        <path d="M 40 520 L 40 570 Q 40 580 50 580 L 253.63 580" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 258.88 580 L 251.88 583.5 L 253.63 580 L 251.88 576.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 40 440 L 80 480 L 40 520 L 0 480 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: 78px; height: 1px; padding-top: 480px; 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;">
+                                输出找不到该学生
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="40" y="484" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输出找不到该学生
+                </text>
+            </switch>
+        </g>
+        <rect x="200" y="620" width="120" height="60" rx="9" ry="9" 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: 650px; 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;">
+                                结束
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="260" y="654" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    结束
+                </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>
--- a/5
+++ b/5
@ -0,0 +1,5 @@
+//10·打印学生成绩 
+PrintScore
+step1:输入学生的学号,姓名.
+step2:查找该学生的成绩
+step3:输出该学生的成绩
--- a/5
+++ b/5
@ -0,0 +1,5 @@
+//10·打印学生成绩 
+PrintScore
+step1:输入学生的学号,姓名.
+step2:查找该学生的成绩
+step3:输出该学生的成绩
--- a/c11.drawio.svg
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+                            </div>
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+                <text x="60" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
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+        </g>
+        <path d="M 120 200 L 193.63 200" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
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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: 1px; height: 1px; padding-top: 200px; margin-left: 160px;">
+                        <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;">
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+                                X&gt;N
+                            </div>
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+                <text x="160" y="203" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
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+                </text>
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+        <path d="M 60 230 L 60 303.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
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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: 1px; height: 1px; padding-top: 270px; margin-left: 60px;">
+                        <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;">
+                                X&lt;N
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="273" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    X&lt;N
+                </text>
+            </switch>
+        </g>
+        <rect x="0" y="170" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
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+                <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: 200px; 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;">
+                                <ol class="linenums" style="box-sizing: border-box; margin: 0px; padding: 0px; list-style-type: none; color: rgb(51, 51, 51); font-family: Consolas, &quot;Liberation Mono&quot;, Menlo, Courier, monospace; font-size: 13.6px; text-align: justify;">
+                                    <li class="L1" style="box-sizing: border-box; margin-top: 0px; margin-right: 0px; margin-left: 0px; padding-top: 0px; padding-bottom: 0px; list-style-type: none; margin-bottom: 0px !important;">
+                                        <code style="box-sizing: border-box; font-size: 12px; font-family: Consolas, &quot;Liberation Mono&quot;, Menlo, Courier, monospace; padding: 0px; margin: 0px; background-color: transparent; border-radius: 3px; display: inline; max-width: initial; overflow: initial; line-height: inherit; overflow-wrap: normal; border: 0px;">
+                                            <span class="typ" style="box-sizing: border-box; margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 0px; margin-bottom: 0px !important; color: rgb(102, 0, 102);">
+                                                WritetoFile
+                                            </span>
+                                        </code>
+                                    </li>
+                                    <li></li>
+                                </ol>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="204" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    WritetoFile
+                </text>
+            </switch>
+        </g>
+        <rect x="200" y="170" 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: 200px; 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;">
+                                结束
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="260" y="204" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    结束
+                </text>
+            </switch>
+        </g>
+        <path d="M 60 370 L 60 443.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 448.88 L 56.5 441.88 L 60 443.63 L 63.5 441.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="0" y="310" width="120" height="60" rx="9" ry="9" 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;">
+                                输入学号和姓名
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="344" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输入学号和姓名
+                </text>
+            </switch>
+        </g>
+        <path d="M 60 510 L 60 583.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 588.88 L 56.5 581.88 L 60 583.63 L 63.5 581.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="0" y="450" width="120" height="60" rx="9" ry="9" 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: 480px; 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;">
+                                输入成绩
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" 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 60 650 L 60 723.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 728.88 L 56.5 721.88 L 60 723.63 L 63.5 721.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="0" y="590" width="120" height="60" rx="9" ry="9" 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: 620px; 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;">
+                                保存到student.txt
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="624" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    保存到student.txt
+                </text>
+            </switch>
+        </g>
+        <rect x="0" y="730" width="120" height="60" rx="9" ry="9" 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>
--- a/c11.md
+++ b/c11.md
@ -0,0 +1,24 @@
+选择菜单命令 10，提示输入学生成绩，通过循环得出各分数段学生人数及所占百分比
+
+请输入你的选择: 10
+关于课程1:
+<60 0 0.00%
+60-70 0 0.00%
+70-80 2 50.00%
+80-90 1 25.00%
+90-100 0 0.00%
+100 1 25.00%
+For course 2:
+<60 0 0.00%
+60-70 0 0.00%
+70-80 0 00.00%
+80-90 2 50.00%
+90-100 2 50.00%
+100 0 0.00%
+For course 3:
+<60 0 0.00%
+60-70 0 0.00%
+70-80 0 0.00%
+80-90 1 25.00%
+90-100 2 50.00%
+100 1 25.00%
--- a/5
+++ b/5
@ -0,0 +1,5 @@
+11·输出n个学生的学号、姓名及m门课程的成绩到文件student.txt中 
+WritetoFile
+step1:输入学生的学号和姓名
+step2:查找该学生的所有课程成绩
+step3:将成绩保存到文件student.txt中
--- a/8
+++ b/8
@ -0,0 +1,8 @@
+C12: 打印学生信息
+选择菜单命令11，打印
+
+请输入你的选择：11
+2214111018 李玉璇 100 95 86 281 93
+2214111038 张桐桐 77 89 99 265 88
+2214111026 孟婷玉 85 91 98 274 91
+2214111022 周羽凡 75 89 100 264 88
--- a/c12.drawio.svg
+++ b/c12.drawio.svg
@ -0,0 +1,90 @@
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+    <defs/>
+    <g>
+        <path d="M 60 80 L 60 163.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
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+        <ellipse cx="60" cy="40" rx="40" 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: 78px; height: 1px; padding-top: 40px; margin-left: 21px;">
+                        <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>
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+                </foreignObject>
+                <text x="60" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
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+                <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;">
+                                查找文件
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
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+            </switch>
+        </g>
+        <path d="M 60 370 L 60 443.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 448.88 L 56.5 441.88 L 60 443.63 L 63.5 441.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="0" y="310" width="120" height="60" rx="9" ry="9" 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;">
+                                读取学生的信息
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="344" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    读取学生的信息
+                </text>
+            </switch>
+        </g>
+        <path d="M 60 510 L 60 583.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 588.88 L 56.5 581.88 L 60 583.63 L 63.5 581.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="0" y="450" width="120" height="60" rx="9" ry="9" 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: 480px; 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;">
+                                存入数组stu中
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="484" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    存入数组stu中
+                </text>
+            </switch>
+        </g>
+        <rect x="0" y="590" width="120" height="60" rx="9" ry="9" 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>
--- a/5
+++ b/5
@ -0,0 +1,5 @@
+12·从文件中读取学生的学号、姓名及成绩等信息写入到结构体数组stu中
+ReadfromFile
+step1:查找文件
+step2:从文件中读取学生的学号姓名成绩
+step3:将信息写入到数组stu中
--- a/24
+++ b/24
@ -0,0 +1,24 @@
+C14：从文件中读取学生信息
+选择菜单命令 13 ，从文件中读取学生的学号、姓名及成绩等信息写入到结构体数组 stu 中。如果文件为空，则给出错误信息并退出程序，反之，逐个读入
+
+请输入你的选择：13
+未能打开你的成绩！
+1 输入成绩
+2 计算所有课程的总分和平均值
+3 计算所有学生的总分和平均值
+4 按分数降序排列
+5 按分数升序排列
+6 按数字升序排列
+7 按名字字母排列
+8 按数字搜索
+9 按名字搜索
+10 统计分析
+11 列表记录
+12 写入文件
+13 从文件中读取
+0 退出
+请输入你的选择：12
+2214111018 李玉璇 100 95 86 281 93
+2214111038 张桐桐 77 89 99 265 88
+2214111026 孟婷玉 85 91 98 274 91
+2214111022 周羽凡 75 89 100 264 88
--- a/11
+++ b/11
@ -0,0 +1,11 @@
+//1 函数功能：输入n个学生的m门课成绩 
+void ReadScore(STU stu[], int n, int m)
+{
+    int i, j;
+    printf("Input student's ID, name and score:\n");
+    for(i=0;i<n;i++)
+    {scanf("%ld%s",&stu[i].num,stu[i].name);
+     for (j=0; j<m; j++)
+     scanf("%f",&stu[i].score[j]);
+    }
+}
--- a/16
+++ b/16
@ -0,0 +1,16 @@
+//2 函数功能：计算每个学生各门课程的总分和平均分 
+void AverSumofEveryStudent(STU stu[], int n, int m)
+{
+    int i, j;
+    for (i=0; i<n; i++)
+    {
+        stu[i].sum = 0;
+        for (j=0; j<m; j++)
+        {
+            stu[i].sum = stu[i].sum + stu[i].score[j];
+        }
+        stu[i].aver = m>0 ? stu[i].sum / m : -1;
+        printf("student %d: sum = %.0f, aver = %.0f\n", 
+i+1, stu[i].sum, stu[i].aver);
+    }    
+}
--- a/17
+++ b/17
@ -0,0 +1,17 @@
+//3 函数功能：计算每门课程的总分和平均分 
+void  AverSumofEveryCourse(STU stu[], int n, int m)
+{
+    int i, j;
+    float sum[COURSE_NUM], aver[COURSE_NUM];
+    for (j=0; j<m; j++)
+    {
+        sum[j] = 0;
+        for (i=0; i<n; i++)
+        {
+            sum[j] +=  stu[i].score[j];
+        }
+        aver[j]=sum[j]/i;
+        printf("student %d: sum = %.0f, aver = %.0f\n", 
+j+1, sum[j], aver[j]); 
+    }
+}
--- a/8
+++ b/8
@ -0,0 +1,8 @@
+选择菜单命令 1 ，假设n=4,m=3,提示输入学生的学号，姓名和成绩，然后利用循环逐个输入学生的学号和姓名以及各科成绩。
+
+请输入你的选择：1
+输入学生的学号，名字和成绩：
+2214111018 李玉璇 100 95 86
+2214111038 张桐桐 77 89 99
+2214111026 孟婷玉 85 91 98
+2214111022 周羽凡 75 89 100
--- a/c4.drawio.svg
+++ b/c4.drawio.svg
@ -0,0 +1,415 @@
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+    <defs/>
+    <g>
+        <path d="M 120 60 L 120 93.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 120 98.88 L 116.5 91.88 L 120 93.63 L 123.5 91.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="60" y="0" width="120" height="60" rx="9" ry="9" 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: 61px;">
+                        <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 style="font-size: 18px;">
+                                    SortbyScore
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="120" y="34" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    SortbyScore
+                </text>
+            </switch>
+        </g>
+        <path d="M 120 160 L 120 193.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 120 198.88 L 116.5 191.88 L 120 193.63 L 123.5 191.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="60" y="100" width="120" height="60" rx="9" ry="9" 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: 130px; margin-left: 61px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                int i,j,k,t
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="120" y="135" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    int i,j,k,t
+                </text>
+            </switch>
+        </g>
+        <path d="M 180 230 L 243.63 230" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 248.88 230 L 241.88 233.5 L 243.63 230 L 241.88 226.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 60 260 L 60 603.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 608.88 L 56.5 601.88 L 60 603.63 L 63.5 601.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="60" y="200" 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: 230px; margin-left: 61px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                i=0 to n-2
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="120" y="235" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    i=0 to n-2
+                </text>
+            </switch>
+        </g>
+        <rect x="190" y="200" width="60" height="40" 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: 220px; margin-left: 220px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: nowrap;">
+                                next
+                                <br/>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="220" y="225" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    next
+                </text>
+            </switch>
+        </g>
+        <path d="M 310 260 L 310 303.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 310 308.88 L 306.5 301.88 L 310 303.63 L 313.5 301.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="250" y="200" width="120" height="60" rx="9" ry="9" 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: 230px; margin-left: 251px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                k=i
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="310" y="235" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    k=i
+                </text>
+            </switch>
+        </g>
+        <path d="M 370 340 L 433.63 340" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 438.88 340 L 431.88 343.5 L 433.63 340 L 431.88 336.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 310 370 L 310 523.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 310 528.88 L 306.5 521.88 L 310 523.63 L 313.5 521.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="250" y="310" width="120" height="60" rx="9" ry="9" 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: 251px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                j = i + 1 to n-1
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="310" y="345" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    j = i + 1 to...
+                </text>
+            </switch>
+        </g>
+        <rect x="370" y="310" width="60" height="40" 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: 330px; margin-left: 400px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: nowrap;">
+                                next
+                                <br/>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="400" y="335" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    next
+                </text>
+            </switch>
+        </g>
+        <path d="M 524 364 L 585.5 425.5" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 589.21 429.21 L 581.78 426.73 L 585.5 425.5 L 586.73 421.78 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 476 364 L 404.5 435.5" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 400.79 439.21 L 403.27 431.78 L 404.5 435.5 L 408.22 436.73 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 500 300 L 560 340 L 500 380 L 440 340 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: 340px; margin-left: 441px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                比较
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="500" y="345" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    比较
+                </text>
+            </switch>
+        </g>
+        <rect x="555" y="360" width="30" height="40" 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: 380px; margin-left: 570px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: nowrap;">
+                                T
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="570" y="385" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    T
+                </text>
+            </switch>
+        </g>
+        <path d="M 570 460 L 426.37 460" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 421.12 460 L 428.12 456.5 L 426.37 460 L 428.12 463.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="570" y="430" width="120" height="60" rx="9" ry="9" 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: 460px; margin-left: 571px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                k = j
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="630" y="465" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    k = j
+                </text>
+            </switch>
+        </g>
+        <rect x="405" y="360" width="30" height="40" 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: 380px; margin-left: 420px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: nowrap;">
+                                F
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="420" y="385" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    F
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="400" cy="460" rx="20" ry="20" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <path d="M 380 460 L 330 460 L 330.04 380.27" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 330.04 373.52 L 334.54 382.52 L 330.04 380.27 L 325.54 382.52 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 350 570 L 473.63 570" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 478.88 570 L 471.88 573.5 L 473.63 570 L 471.88 566.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 270 570 L 156.37 570" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 151.12 570 L 158.12 566.5 L 156.37 570 L 158.12 573.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 310 530 L 350 570 L 310 610 L 270 570 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: 78px; height: 1px; padding-top: 570px; 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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                k!=i
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="310" y="575" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    k!=i
+                </text>
+            </switch>
+        </g>
+        <rect x="385" y="530" width="30" height="40" 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: 550px; margin-left: 400px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: nowrap;">
+                                T
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="400" y="555" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    T
+                </text>
+            </switch>
+        </g>
+        <path d="M 600 570 L 703.63 570" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 708.88 570 L 701.88 573.5 L 703.63 570 L 701.88 566.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 540 600 L 540 663.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 540 668.88 L 536.5 661.88 L 540 663.63 L 543.5 661.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="480" y="540" width="120" height="60" rx="9" ry="9" 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: 570px; margin-left: 481px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                t=0 to m-1
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="540" y="575" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    t=0 to m-1
+                </text>
+            </switch>
+        </g>
+        <rect x="620" y="540" width="60" height="40" 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: 560px; margin-left: 650px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: nowrap;">
+                                next
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="650" y="565" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    next
+                </text>
+            </switch>
+        </g>
+        <path d="M 710 585 L 606.37 585" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 601.12 585 L 608.12 581.5 L 606.37 585 L 608.12 588.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="710" y="540" 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: 570px; 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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                交换分数
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="770" y="575" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    交换分数
+                </text>
+            </switch>
+        </g>
+        <path d="M 540 730 L 540 773.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 540 778.88 L 536.5 771.88 L 540 773.63 L 543.5 771.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="480" y="670" 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: 700px; margin-left: 481px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                交换总分
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="540" y="705" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    交换总分
+                </text>
+            </switch>
+        </g>
+        <path d="M 540 840 L 540 883.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 540 888.88 L 536.5 881.88 L 540 883.63 L 543.5 881.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="480" y="780" 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: 810px; margin-left: 481px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                交换平均分
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="540" y="815" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    交换平均分
+                </text>
+            </switch>
+        </g>
+        <path d="M 540 950 L 540 983.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 540 988.88 L 536.5 981.88 L 540 983.63 L 543.5 981.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="480" y="890" 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: 920px; margin-left: 481px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                交换学号
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="540" y="925" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    交换学号
+                </text>
+            </switch>
+        </g>
+        <rect x="480" y="990" 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: 1020px; margin-left: 481px;">
+                        <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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                交换姓名
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="540" y="1025" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    交换姓名
+                </text>
+            </switch>
+        </g>
+        <path d="M 480 1020 L 150 1020 L 150 267.87" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 150 261.12 L 154.5 270.12 L 150 267.87 L 145.5 270.12 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="0" y="610" width="120" height="60" rx="9" ry="9" 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: 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: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                return
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="645" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
+                    return
+                </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>
--- a/c4.md
+++ b/c4.md
@ -0,0 +1,8 @@
+选择菜单命令 1 ，假设n=4,m=3,提示输入学生的学号，姓名和成绩，然后利用循环逐个输入学生的学号和姓名以及各科成绩。
+
+请输入你的选择：1
+输入学生的学号，名字和成绩：
+2214111018 李玉璇 100 95 86
+2214111038 张桐桐 77 89 99
+2214111026 孟婷玉 85 91 98
+2214111022 周羽凡 75 89 100
--- a/24
+++ b/24
@ -0,0 +1,24 @@
+//4 函数功能：按选择法将数组sum的元素值排序 
+void SortbyScore(STU stu[],int n,int m,int (*compare)(float a,float b))
+{
+    int  i, j, k, t;
+    for (i=0; i<n-1; i++)
+    {
+        k = i;
+        for (j=i+1; j<n; j++)
+        {
+            if ((*compare)(stu[j].sum, stu[k].sum)) k = j;
+        }
+        if (k != i)
+        {           
+           for (t=0; t<m; t++)             // 交换m门课程的成绩 
+            {
+                SwapFloat(&stu[k].score[t], &stu[i].score[t]);
+            }
+SwapFloat(&stu[k].sum, &stu[i].sum);    // 交换总分 
+SwapFloat(&stu[k].aver, &stu[i].aver); // 交换平均分   
+SwapLong(&stu[k].num, &stu[i].num);     // 交换学号 
+SwapChar(stu[k].name, stu[i].name);     // 交换姓名 
+        }
+    }
+}
--- a/16
+++ b/16
@ -0,0 +1,16 @@
+C5: 计算学生各门课程总分和平均分
+选择菜单命令 2 ，计算学生各门课程总分和平均分,然后利用循环逐个输出学生的顺序，总成绩和平均分，结果都取整数。
+
+请输入你的选择：2
+学生 李玉璇： 总分 = 281， 平均分 = 93
+学生 张桐桐： 总分 = 265， 平均分 = 88
+学生 孟婷玉： 总分 = 274， 平均分 = 91
+学生 周羽凡： 总分 = 264， 平均分 = 88
+
+c6:计算每门课程的总分和平均分
+选择菜单命令 3，计算每门课程的总分和平均分，然后利用循环逐个输出每门课程的总分和平均分，结果都取整数。
+
+请输入你的选择： 3
+课程 1： 总分 = 337， 平均分 = 84
+课程 2： 总分 = 364， 平均分 = 91
+课程 3： 总分 = 383， 平均分 = 95
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+                                输入每个学生的成绩
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+                                除以学生总数并乘以百分百
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+        <path d="M 120 760 L 193.63 760" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
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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: 1px; height: 1px; padding-top: 760px; margin-left: 160px;">
+                        <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="160" y="763" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <rect x="0" y="730" width="120" height="60" rx="9" ry="9" 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: 760px; 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;">
+                                &gt;=70
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="764" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    &gt;=70
+                </text>
+            </switch>
+        </g>
+        <path d="M 60 930 L 60 1003.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 1008.88 L 56.5 1001.88 L 60 1003.63 L 63.5 1001.88 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: 970px; margin-left: 60px;">
+                        <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="60" y="973" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    N
+                </text>
+            </switch>
+        </g>
+        <path d="M 120 900 L 193.63 900" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 198.88 900 L 191.88 903.5 L 193.63 900 L 191.88 896.5 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: 900px; margin-left: 160px;">
+                        <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="160" y="903" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <rect x="0" y="870" width="120" height="60" rx="9" ry="9" 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: 900px; 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;">
+                                &gt;=60
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="904" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    &gt;=60
+                </text>
+            </switch>
+        </g>
+        <path d="M 120 1040 L 193.63 1040" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 198.88 1040 L 191.88 1043.5 L 193.63 1040 L 191.88 1036.5 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: 1040px; margin-left: 160px;">
+                        <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="160" y="1043" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="11px" text-anchor="middle">
+                    Y
+                </text>
+            </switch>
+        </g>
+        <rect x="0" y="1010" width="120" height="60" rx="9" ry="9" 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: 1040px; 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;">
+                                &lt;60
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="1044" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    &lt;60
+                </text>
+            </switch>
+        </g>
+        <path d="M 320 640 L 636.01 745.34" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 640.99 747 L 633.24 748.1 L 636.01 745.34 L 635.46 741.46 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="200" y="590" width="120" height="60" rx="9" ry="9" 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: 620px; 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;">
+                                除以学生总数并乘以百分百
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="260" y="624" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    除以学生总数并乘以百分百
+                </text>
+            </switch>
+        </g>
+        <path d="M 320 760 L 633.63 760" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 638.88 760 L 631.88 763.5 L 633.63 760 L 631.88 756.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="200" y="730" width="120" height="60" rx="9" ry="9" 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: 760px; 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;">
+                                除以学生总数并乘以百分百
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="260" y="764" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    除以学生总数并乘以百分百
+                </text>
+            </switch>
+        </g>
+        <path d="M 320 882.89 L 645.59 790.03" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 650.64 788.59 L 644.87 793.88 L 645.59 790.03 L 642.95 787.14 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="200" y="870" width="120" height="60" rx="9" ry="9" 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: 900px; 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;">
+                                除以学生总数并乘以百分百
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="260" y="904" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    除以学生总数并乘以百分百
+                </text>
+            </switch>
+        </g>
+        <path d="M 315 1010 L 694.41 803.05" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 699.02 800.54 L 694.55 806.96 L 694.41 803.05 L 691.2 800.81 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="200" y="1010" width="120" height="60" rx="9" ry="9" 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: 1040px; 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;">
+                                除以学生总数并乘以百分百
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="260" y="1044" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    除以学生总数并乘以百分百
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="680" cy="760" rx="40" 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: 78px; height: 1px; padding-top: 760px; margin-left: 641px;">
+                        <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
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="680" y="764" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输出
+                </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>
--- a/5
+++ b/5
@ -0,0 +1,5 @@
+9·统计各分数段的学生人数及所占的百分比
+StatisticAnalysis
+step1:输入每个学生的成绩
+step2:判断输入成绩所在的分数段
+step3:将各个分数段的成绩个数除以学生总人数并乘以百分百
--- a/380
+++ b/380
@ -1 +1,379 @@
-undefined
+#include  <stdio.h>
+#include  <stdlib.h>
+#include  <string.h>
+#define   MAX_LEN  10                        // 字符串最大长度 
+#define   STU_NUM 30                       // 最多的学生人数 
+#define   COURSE_NUM 6                     // 最多的考试科目数 
+typedef struct student
+{
+        long num;                        // 每个学生的学号 
+        char name[MAX_LEN];                // 每个学生的姓名 
+        float score[COURSE_NUM];        // 每个学生COURSE_NUM门功课的成绩 
+        float sum;                         // 每个学生的总成绩 
+        float aver;                        // 每个学生的平均成绩 
+}STU;
+int   Menu(void);
+void  ReadScore(STU stu[], int n, int m);
+void  AverSumofEveryStudent(STU stu[], int n, int m);
+void  AverSumofEveryCourse(STU stu[], int n, int m);
+void  SortbyScore(STU stu[],int n,int m,int (*compare)(float a,float b));
+int   Ascending(float a, float b);
+int   Descending(float a, float b);
+void  SwapFloat(float *x, float *y);
+void  SwapLong(long *x, long *y);
+void  SwapChar(char x[], char y[]);
+void  AsSortbyNum(STU stu[], int n, int m);
+void  SortbyName(STU stu[], int n, int m);
+void  SearchbyNum(STU stu[], int n, int m);
+void  SearchbyName(STU stu[], int n, int m);
+void  StatisticAnalysis(STU stu[], int n, int m);
+void  PrintScore(STU stu[], int n, int m);
+void  WritetoFile(STU record[], int n, int m);
+void  ReadfromFile(STU record[], int *n, int *m);
+int main(void)
+{
+    char  ch;
+    int   n = 0, m = 0;
+    STU   stu[STU_NUM];    
+printf("Input student number(n<%d):", STU_NUM);
+    scanf("%d", &n);
+printf("Input course number(m<=%d):",COURSE_NUM);
+    scanf("%d", &m);
+    while (1)
+    {
+        ch = Menu();                        // 显示菜单，并读取用户输入         
+        switch (ch)
+        {
+            case 1:ReadScore(stu, n, m);
+                    break;
+            case 2: AverSumofEveryCourse(stu, n, m);                        
+                    break;
+            case 3: AverSumofEveryStudent(stu, n, m);                    
+                    break;
+            case 4: SortbyScore(stu, n, m, Descending);
+                    printf("\nSort in descending order by score:\n");
+                    PrintScore(stu, n, m);
+                    break;
+            case 5: SortbyScore(stu, n, m, Ascending);
+                    printf("\nSort in ascending order by score:\n");
+                    PrintScore(stu, n, m);
+                    break;
+            case 6: AsSortbyNum(stu, n, m);
+                    printf("\nSort in ascending order by number:\n");
+                    PrintScore(stu, n, m);
+                    break;
+            case 7: SortbyName(stu, n, m);
+                    printf("\nSort in dictionary order by name:\n");
+                    PrintScore(stu, n, m);
+                    break;
+            case 8: SearchbyNum(stu, n, m);
+                    break;
+            case 9: SearchbyName(stu, n, m);
+                    break;
+            case 10: StatisticAnalysis(stu, n, m);
+                    break;
+            case 11:PrintScore(stu, n, m);
+                    break;
+case 12:WritetoFile(stu, n, m);
+                     break;
+            case 13:ReadfromFile(stu, &n, &m);
+                     break;
+            case 0: printf("End of program!");
+                       exit(0);
+            default:printf("Input error!");
+        }
+    }
+    return 0;}
+//  函数功能：显示菜单并获得用户键盘输入的选项 
+int Menu(void)
+{
+        int itemSelected;
+        printf("Management for Students' scores\n");
+        printf("1.Input record\n");
+        printf("2.Calculate total and average score of every course\n");
+        printf("3.Calculate total and average score of every student\n");
+        printf("4.Sort in descending order by score\n");
+        printf("5.Sort in ascending order by score\n");
+        printf("6.Sort in ascending order by number\n");
+        printf("7.Sort in dictionary order by name\n");
+        printf("8.Search by number\n");
+        printf("9.Search by name\n");
+        printf("10.Statistic analysis\n");
+        printf("11.List record\n");
+        printf("12.Write to a file\n");
+        printf("13.Read from a file\n");
+        printf("0.Exit\n");
+        printf("Please Input your choice:");
+        scanf("%d", &itemSelected);     // 读入用户输入 
+        return itemSelected;
+}
+//1 函数功能：输入n个学生的m门课成绩 
+void ReadScore(STU stu[], int n, int m)
+{
+    int i, j;
+    printf("Input student's ID, name and score:\n");
+    for(i=0;i<n;i++)
+    {scanf("%ld%s",&stu[i].num,stu[i].name);
+     for (j=0; j<m; j++)
+     scanf("%f",&stu[i].score[j]);
+    }
+}
+//2 函数功能：计算每个学生各门课程的总分和平均分 
+void AverSumofEveryStudent(STU stu[], int n, int m)
+{
+    int i, j;
+    for (i=0; i<n; i++)
+    {
+        stu[i].sum = 0;
+        for (j=0; j<m; j++)
+        {
+            stu[i].sum = stu[i].sum + stu[i].score[j];
+        }
+        stu[i].aver = m>0 ? stu[i].sum / m : -1;
+        printf("student %d: sum = %.0f, aver = %.0f\n", 
+i+1, stu[i].sum, stu[i].aver);
+    }    
+}
+//3 函数功能：计算每门课程的总分和平均分 
+void  AverSumofEveryCourse(STU stu[], int n, int m)
+{
+    int i, j;
+    float sum[COURSE_NUM], aver[COURSE_NUM];
+    for (j=0; j<m; j++)
+    {
+        sum[j] = 0;
+        for (i=0; i<n; i++)
+        {
+            sum[j] +=  stu[i].score[j];
+        }
+        aver[j]=sum[j]/i;
+        printf("student %d: sum = %.0f, aver = %.0f\n", 
+j+1, sum[j], aver[j]); 
+    }
+}
+//4 函数功能：按选择法将数组sum的元素值排序 
+void SortbyScore(STU stu[],int n,int m,int (*compare)(float a,float b))
+{
+    int  i, j, k, t;
+    for (i=0; i<n-1; i++)
+    {
+        k = i;
+        for (j=i+1; j<n; j++)
+        {
+            if ((*compare)(stu[j].sum, stu[k].sum)) k = j;
+        }
+        if (k != i)
+        {           
+           for (t=0; t<m; t++)             // 交换m门课程的成绩 
+            {
+                SwapFloat(&stu[k].score[t], &stu[i].score[t]);
+            }
+SwapFloat(&stu[k].sum, &stu[i].sum);    // 交换总分 
+SwapFloat(&stu[k].aver, &stu[i].aver); // 交换平均分   
+SwapLong(&stu[k].num, &stu[i].num);     // 交换学号 
+SwapChar(stu[k].name, stu[i].name);     // 交换姓名 
+        }
+    }
+}
+// 5使数据按升序排序 
+int Ascending(float a, float b)
+{
+    return a < b;      // 这样比较决定了按升序排序，如果a<b，则交换 
+}
+// 6使数据按降序排序 
+int Descending(float a, float b)
+{
+    return a > b;
+}
+// 7交换两个单精度浮点型数据 
+void  SwapFloat(float *x, float *y)
+{
+float temp;
+temp = *x;
+*x = *y;
+*y = temp;
+}
+// 8交换两个长整型数据 
+void  SwapLong(long *x, long *y)
+{
+long   temp;
+temp = *x; 
+*x = *y;  
+*y = temp;
+}
+// 9交换两个字符串 
+void  SwapChar(char x[], char y[])
+{
+char temp[MAX_LEN];
+strcpy(temp, x);
+strcpy(x, y);
+strcpy(y, temp);
+}
+// 10函数功能：按选择法将数组num的元素值按从低到高排序 
+void AsSortbyNum(STU stu[], int n, int m)
+{
+    int  i, j, k, t;
+    for (i=0; i<n-1; i++)
+    {
+        K=i;
+        for(j=i+1;j<10;j++)
+        {
+            if((*compare)(stu[k]num.stu[j].num)) k=j;}
+        if(k!=i)
+        {t=stu[i].num;stu[i].num=stu[k].num;stu[k].num=t;}
+    }
+}
+// 11函数功能：交换法实现字符串按字典顺序排序 
+void AsSortbyNum(STU stu[], int n, int m)
+{
+    int  i, j, k, t;
+    for (i=0; i<n-1; i++)
+    {
+        k = i;
+        for (j=i+1; j<n; j++)
+        {
+            if (stu[j].num < stu[k].num)    k = j;
+        }
+        if (k != i)
+        {
+            for (t=0; t<m; t++)          
+              {
+                   SwapFloat(&stu[k].score[t], &stu[i].score[t]);
+            }
+SwapFloat(&stu[k].sum, &stu[i].sum);  
+SwapFloat(&stu[k].aver, &stu[i].aver);   
+SwapLong(&stu[k].num, &stu[i].num);     
+SwapChar(stu[k].name, stu[i].name);  
+        }
+    }
+}
+// 12函数功能：按学号查找学生成绩并显示查找结果 
+void SearchbyNum(STU stu[], int n, int m)
+{
+    long number;
+    int   i, j;
+    printf("Input the number you want to search:");
+    scanf("%ld", &number);
+    for(i=0;i<n;i++)
+    {
+    if (stu[i].num==number)
+        {
+            printf("%ld\t%s\t", stu[i].num, stu[i].name);
+            for (j=0; j<m; j++)
+            {
+                printf("%.0f\t", stu[i].score[j]);
+            }
+            printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver);
+            return;
+        }
+    printf("\nNot found!\n");
+}
+}
+// 13函数功能：按姓名的字典顺序排出成绩表
+void SearchbyName(STU stu[], int n, int m)
+{
+    char x[MAX_LEN];
+    int  i, j;
+    printf("Input the name you want to search:");
+    scanf("%s", x);
+    for (i=0; i<n; i++)
+    {
+        if (strcmp(stu[i].name, x) == 0)
+        {
+            printf("%ld\t%s\t", stu[i].num, stu[i].name);
+            for (j=0; j<m; j++)
+            {
+                printf("%.0f\t", stu[i].score[j]);
+            }
+            printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver);
+            return;
+        }
+    }
+    printf("\nNot found!\n");
+}
+// 14函数功能：统计各分数段的学生人数及所占的百分比 
+void StatisticAnalysis(STU stu[], int n, int m)
+{
+    int  i, j, t[6];
+    for (j=0; j<m; j++)
+    {
+        printf("For course %d:\n", j+1);
+         memset(t, 0, sizeof(t)); 
+        for (i=0; i<n; i++)
+        {
+            if (stu[i].score[j]>=0 && stu[i].score[j]<60)t[0]++;
+            else if (stu[i].score[j]<70)                   t[1]++;
+            else if (stu[i].score[j]<80)                   t[2]++;
+            else if (stu[i].score[j]<90)                   t[3]++;
+            else if (stu[i].score[j]<100)                   t[4]++;
+            else if (stu[i].score[j] == 100)                 t[5]++;
+        }
+        for (i=0; i<=5; i++)
+        {
+            if (i==0) printf("<60\t%d\t%.2f%%\n",t[i],(float)t[i]/n*100);
+           else if (i==5) printf("%d\t%d\t%.2f%%\n",
+(i+5)*10,t[i],(float)t[i]/n*100);
+           else     printf("%d-%d\t%d\t%.2f%%\n", 
+(i+5)*10, (i+5)*10+9, t[i], (float)t[i]/n*100);    
+        }
+    }
+}
+// 15函数功能： 打印学生成绩 
+void PrintScore(STU stu[], int n, int m)
+{
+    int i, j;
+    for (i=0; i<n; i++)
+    {
+        printf("%ld\t%s\t", stu[i].num, stu[i].name);
+        for (j=0; j<m; j++)
+        {
+            printf("%.0f\t", stu[i].score[j]);
+        }
+        printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver);
+    }
+}
+// 16输出n个学生的学号、姓名及m门课程的成绩到文件student.txt中 
+void WritetoFile(STU stu[], int n, int m)
+{
+    FILE *fp;
+    int i, j;
+    if ((fp = fopen("student.txt","w")) == NULL) 
+    { 
+        printf("Failure to open score.txt!\n");
+        exit(0);
+    }
+fprintf(fp, "%d\t%d\n", n, m);    //将学生人数和课程门数写入文件
+    for (i=0; i<n; i++)
+    {
+        fprintf(fp, "%10ld%10s", stu[i].num, stu[i].name);
+        for (j=0; j<m; j++)
+        {
+            fprintf(fp, "%10.0f", stu[i].score[j]);
+        }
+        fprintf(fp, "%10.0f%10.0f\n", stu[i].sum, stu[i].aver);
+    }
+    fclose(fp);
+}
+//17从文件中读取学生的学号、姓名及成绩等信息写入到结构体数组stu中
+void ReadfromFile(STU stu[],int *n, int *m)
+{
+    FILE *fp;
+    int i, j;
+    if ((fp = fopen("student.txt","r")) == NULL) 
+    { 
+        printf("Failure to open score.txt!\n");
+        exit(0);
+    }
+     fscanf(fp, "%d\t%d", n, m); // 从文件中读出学生人数和课程门数       
+    for (i=0; i<*n; i++)  //学生人数保存在n指向的存储单元
+    {
+        fscanf(fp, "%10ld", &stu[i].num);
+        fscanf(fp, "%10s", stu[i].name);  
+        for (j=0; j<*m; j++)//课程门数保存在m指向的存储单元
+        {
+            fscanf(fp, "%10f", &stu[i].score[j]);          //不能用%10.0f
+        }
+        fscanf(fp, "%10f%10f", &stu[i].sum, &stu[i].aver);//不能用%10.0f
+    }
+    fclose(fp);        
+}
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+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 78px; height: 1px; padding-top: 480px; 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;">
+                                输出找不到该学生
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="40" y="484" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    输出找不到该学生
+                </text>
+            </switch>
+        </g>
+        <rect x="200" y="620" width="120" height="60" rx="9" ry="9" 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: 650px; 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;">
+                                结束
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="260" y="654" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    结束
+                </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>
--- a/23
+++ b/23
@ -0,0 +1,23 @@
+选择菜单命令 10，提示输入学生成绩，通过循环得出各分数段学生人数及所占百分比
+请输入你的选择: 10
+关于课程1:
+<60 0 0.00%
+60-70 0 0.00%
+70-80 2 50.00%
+80-90 1 25.00%
+90-100 0 0.00%
+100 1 25.00%
+For course 2:
+<60 0 0.00%
+60-70 0 0.00%
+70-80 0 00.00%
+80-90 2 50.00%
+90-100 2 50.00%
+100 0 0.00%
+For course 3:
+<60 0 0.00%
+60-70 0 0.00%
+70-80 0 0.00%
+80-90 1 25.00%
+90-100 2 50.00%
+100 1 25.00%
Author	SHA1	Message	Date
p2pwza8cv	0a4ad7d750	Update README.md	2 years ago
pe4c6pn3v	d081aba5eb	Update README.md	2 years ago
pn8rjlxip	de5cf0f573	Update README.md	2 years ago
tong tong zhang	c6a74ee017	1	2 years ago
tong tong zhang	2eb57a1334	111	2 years ago
tong tong zhang	dbd31865c0	8	2 years ago
tong tong zhang	fe977c4af7	6	2 years ago
tong tong zhang	5fbf3ef91e	123	2 years ago
tong tong zhang	a0e7cf052e	Merge remote-tracking branch 'origin/mtyc13.md'	2 years ago
tong tong zhang	89b53f3c1e	0	2 years ago
tong tong zhang	cb4adcc842	9	2 years ago
tong tong zhang	b4b9a4e5d9	Merge remote-tracking branch 'origin/mtyc13.md'	2 years ago
tong tong zhang	b20170da3a	8	2 years ago
tong tong zhang	61baee9187	Merge remote-tracking branch 'origin/c4函数zyf'	2 years ago
tong tong zhang	2063f8a61f	Merge remote-tracking branch 'origin/c3函数zyf'	2 years ago
tong tong zhang	a8fe51bac6	Merge remote-tracking branch 'origin/c2函数zyf'	2 years ago
tong tong zhang	24921f8914	Merge remote-tracking branch 'origin/c1函数zyf'	2 years ago
tong tong zhang	c1650b63ba	7	2 years ago
tong tong zhang	1f685bde29	123	2 years ago
tong tong zhang	82c3565e85	6	2 years ago
tong tong zhang	08f65d0430	5	2 years ago
tong tong zhang	0413c3e3ae	4	2 years ago
tong tong zhang	45e92fb792	Merge remote-tracking branch 'origin/c11流程图伪代码'	2 years ago
zhouyufan	b49525483a	c4函数代码	2 years ago
zhouyufan	5f074a5191	Merge branch 'c3函数zyf'	2 years ago
zhouyufan	c73cddd643	c3函数代码	2 years ago
zhouyufan	7baf24c717	Merge branch 'c2函数zyf'	2 years ago
zhouyufan	e17db05174	c2函数代码zyf	2 years ago
zhouyufan	2cee23a353	Merge branch 'c1函数zyf'	2 years ago
zhouyufan	dffc513149	c1函数代码zyf	2 years ago
pn8rjlxip	3807927cc6	Merge pull request 'c4' (#2 ) from pe4c6pn3v/StudentSystem:c4 into master	2 years ago
zhouyufan	8b474f8dbd	Merge branch 'c11流程图伪代码'	2 years ago
zhouyufan	2c0d87a10e	c11流程图和伪代码	2 years ago
pn8rjlxip	be9dfd394d	Merge pull request '流程图' (#3 ) from pe4c6pn3v/StudentSystem:流程图 into master	2 years ago
zhouyufan	95520e3782	Merge branch 'c12流程图伪代码zyf'	2 years ago
zhouyufan	ba6ecb5a01	c12流程图和伪代码	2 years ago
tong tong zhang	190effc3e0	444	2 years ago
tong tong zhang	ece265fca3	Merge branch 'ztt图'	2 years ago
liyuxuan	56b6afa5b8	lct	2 years ago
tong tong zhang	14c7c7aba9	1111	2 years ago
tong tong zhang	4648dc2855	333	2 years ago
zhouyufan	0bbd93af0c	Merge branch 'C10ZYF'	2 years ago
zhouyufan	967c6d81b2	c10流程图伪代码	2 years ago
tong tong zhang	40cdb07bcb	q	2 years ago
tong tong zhang	f051196241	tu	2 years ago
tong tong zhang	2620dca10a	1111	2 years ago
tong tong zhang	7159301fe9	111	2 years ago
zhouyufan	f9b7c42395	C10ZYF	2 years ago
zhouyufan	36595d8210	C10ZYF	2 years ago
liyuxuan	08348793c9	c4	2 years ago
liyuxuan	ce9d2d335c	c1	2 years ago
tong tong zhang	f72249598c	3	2 years ago
liyuxuan	73acc846a1	xitong	2 years ago
zhouyufan	23f488d659	Merge branch 'c9流程图'	2 years ago
zhouyufan	0ec91e858c	c9	2 years ago
tong tong zhang	15467a568b	2	2 years ago
tong tong zhang	fd32946b22	Merge remote-tracking branch 'origin/c14'	2 years ago
tong tong zhang	42f0bff6b8	Merge branch 'mtyc13.md'	2 years ago
tong tong zhang	416191a38b	Merge branch 'c10'	2 years ago
zhouyufan	750b48d344	Merge remote-tracking branch 'origin/c14'	2 years ago
zhouyufan	09504fdc87	c14	2 years ago
tong tong zhang	7df808f005	1	2 years ago
tong tong zhang	8150cb0ec4	c10	2 years ago
pe4c6pn3v	28b573571e	Add c4	2 years ago
tong tong zhang	7b7bd6d42f	Merge branch 'mty.md'	2 years ago
tong tong zhang	296c936121	Merge branch 'lyx.1'	2 years ago
liyuxuan	62f2ed0d66	c4 c11	2 years ago
tong tong zhang	7beb247eef	Merge branch 'master' of https://bdgit.educoder.net/pn8rjlxip/StudentSystem	2 years ago
tong tong zhang	2bdda1e55c	Merge branch 'zyf'	2 years ago
zhouyufan	b8fb4acc43	Merge branch 'master' of https://bdgit.educoder.net/pn8rjlxip/StudentSystem	2 years ago
zhouyufan	7eff72091d	Merge branch 'zyf'	2 years ago
zhouyufan	4cadfd1404	c12	2 years ago
zhouyufan	b35a09ee5b	c5c6	2 years ago
tong tong zhang	7a4f9eec25	Merge branch 'master' of https://bdgit.educoder.net/pn8rjlxip/StudentSystem	2 years ago
tong tong zhang	963e3260fc	Merge branch 'ztt1'	2 years ago
pe4c6pn3v	6d9449d09b	Add 统计学生信息	2 years ago
tong tong zhang	3765b6c9b1	zttc1-c2	2 years ago