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@ -379,6 +379,15 @@ Step 2: 显示图表
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
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
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#### delete_data
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Step 1: 输入学号
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Step 2: if 不存在 then 提示学生不存在并结束
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Step 3: else 删除学生信息
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Step 4: 提示删除成功
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
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#### confirm
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#### confirm
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Step 1: 输出 确定要退出吗
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Step 1: 输出 确定要退出吗
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