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@ -353,6 +353,13 @@ Step 2: 显示图表
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![](pictures/make_chart.drawio.svg)
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![](pictures/make_chart.drawio.svg)
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#### query_data
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Step 1: 输入学生学号
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Step 2: if学号不存在 then 提示学生不存在并结束
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Step 3: else 学号存在 then 输出学号、姓名、成绩
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![](pictures/query_data.drawio.svg)
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#### confirm
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#### confirm
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