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@ -250,6 +250,7 @@ a: No such file or directory
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## 详细设计
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针对概要设计
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### main
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```
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Step 1: 初始化
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Step 2: 根据用户选择的命令执行对应的操作
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Step 2.1: 显示菜单
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@ -258,33 +259,40 @@ Step 2.3: if c == CMD_READ then 读取数据
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Step 2.4: if c == CMD_SAVE then 保存数据
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Step 2.5: if c == CMD_PRINT then 打印数据
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Step 2.6:
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```
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
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### save_data
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```
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Step 1: 输入文件名
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Step 2: 打开文件
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Step 3: if 打开文件失败 then 提示打开文件失败并结束
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Step 4: 将所有库存记录写入文件
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Step 5: 关闭文件
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```
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
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### print_data
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```
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Step 1: for 0 to num_part-1
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Step 2: 打印学生成绩
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```
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
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### query_data
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```
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Step 1: for 0 to num_part-1 查询
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Step 2: 输入查询学号
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Step 3: 根据查询结果输出
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```
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
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### add_data
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```
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Step 1: for 0 to num_part-1 添加
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Step 2: 输入添加学号
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Step 3: if 成立则结束 else 输入学生名称、名次,添加分数, 并提示完成
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```
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
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### update_data
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```
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Step 1: for 0 to num_part-1 修改
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Step 2: 输入修改学号
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Step 3: if 不成立则结束 else 输出学生信息
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Step 3: if 不成立则结束 else 输出学生信息
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```
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