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### C1: 启动程序
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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。
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```
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Management for Students'scores
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1 Input record
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2 Calculate total and average score of every course
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3 Calculate total and average score of every student
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4 Sort in descending order by score
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5 Sort in ascending order by score
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6 Sort in ascending order by number
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7 Sort in dictionary order by name
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8 Search by number
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9 Search by name
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10 Statistic analysis
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11 List record
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12 Write to a file
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13 Read from a file
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0 Exit
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Please Input your choice:
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```
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### C2: 显示命令菜单
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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
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```
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Management for Students'scores
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1 Input record
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2 Calculate total and average score of every course
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3 Calculate total and average score of every student
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4 Sort in descending order by score
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5 Sort in ascending order by score
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6 Sort in ascending order by number
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7 Sort in dictionary order by name
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8 Search by number
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9 Search by name
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10 Statistic analysis
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11 List record
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12 Write to a file
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13 Read from a file
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0 Exit
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Please Input your choice:
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```
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### C3: 退出程序
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选择菜单命令 0 ，再输入 y 确认，则退出程序。
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```
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Please Input your choice: 0
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Are you sure you want to exit?(Y/N): y
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End of program!
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```
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### C4: 添加学生信息
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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。
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```
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Please Input your choice: 1
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Input student's ID, name and score:
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2214111006 XuZilin 100 95 86
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2214111009 XuZigui 77 89 99
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2214111011 ZhangYu 85 91 98
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2214111025 LiYujia 75 89 100
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```
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### C5: 计算学生各门课程总分和平均分
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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。
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```
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Please Input your choice: 2
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student 1: sum = 281, aver = 93
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student 2: sum = 265, aver = 88
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student 3: sum = 274, aver = 91
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student 4: sum = 264, aver = 88
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|
```
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### C6: 计算每门课程的总分和平均分
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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。
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```
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Please Input your choice: 3
|
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|
course 1: sum = 337, aver = 84
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course 2: sum = 364, aver = 91
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course 3: sum = 383, aver = 95
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|
```
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|
### C7: 学生总分排序
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如果a < b,则按升序排列。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。
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|
|
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。
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|
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|
|
|
```
|
|
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|
|
Please Input your choice: 4
|
|
|
|
|
|
Sort in descending order by score:
|
|
|
|
|
|
2214111006 XuZilin 100 95 86 281 93
|
|
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|
|
|
2214111011 ZhangYu 85 91 98 274 91
|
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2214111009 XuZigui 77 89 99 265 88
|
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|
|
2214111025 LiYujia 75 89 100 264 88
|
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|
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|
|
Please Input your choice: 5
|
|
|
|
|
|
Sort in ascending order by score:
|
|
|
|
|
|
2214111025 LiYujia 75 89 100 264 88
|
|
|
|
|
|
2214111009 XuZigui 77 89 99 265 88
|
|
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|
|
|
2214111011 ZhangYu 85 91 98 274 91
|
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|
|
|
2214111006 XuZilin 100 95 86 281 93
|
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|
|
|
|
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|
|
```
|
|
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|
|
|
|
### C8: 学号顺序排序
|
|
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|
|
|
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。
|
|
|
|
|
|
```
|
|
|
|
|
|
Please Input your choice: 6
|
|
|
|
|
|
Sort in ascending order by number:
|
|
|
|
|
|
2214111006 XuZilin 100 95 86 281 93
|
|
|
|
|
|
2214111009 XuZigui 77 89 99 265 88
|
|
|
|
|
|
2214111011 ZhangYu 85 91 98 274 91
|
|
|
|
|
|
2214111025 LiYujia 75 89 100 264 88
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
### C9: 姓名顺序排序
|
|
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|
|
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|
|
|
|
|
|
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。
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
Please Input your choice: 7
|
|
|
|
|
|
Sort in dictionary order by name:
|
|
|
|
|
|
2214111025 LiYujia 75 89 100 264 88
|
|
|
|
|
|
2214111009 XuZigui 77 89 99 265 88
|
|
|
|
|
|
2214111006 XuZilin 100 95 86 281 93
|
|
|
|
|
|
2214111011 ZhangYu 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。
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
Please Input your choice: 8
|
|
|
|
|
|
Input the number you want to search:2214111011
|
|
|
|
|
|
2214111011 ZhangYu 85 91 98 274 91
|
|
|
|
|
|
|
|
|
|
|
|
1 Input record
|
|
|
|
|
|
2 Calculate total and average score of every course
|
|
|
|
|
|
3 Calculate total and average score of every student
|
|
|
|
|
|
4 Sort in descending order by score
|
|
|
|
|
|
5 Sort in ascending order by score
|
|
|
|
|
|
6 Sort in ascending order by number
|
|
|
|
|
|
7 Sort in dictionary order by name
|
|
|
|
|
|
8 Search by number
|
|
|
|
|
|
9 Search by name
|
|
|
|
|
|
10 Statistic analysis
|
|
|
|
|
|
11 List record
|
|
|
|
|
|
12 Write to a file
|
|
|
|
|
|
13 Read from a file
|
|
|
|
|
|
0 Exit
|
|
|
|
|
|
|
|
|
|
|
|
Please Input your choice: 8
|
|
|
|
|
|
Input the number you want to search:2214111001
|
|
|
|
|
|
Not found!
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
- 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。
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
Please Input your choice: 9
|
|
|
|
|
|
Input the name you want to search:LiYujia
|
|
|
|
|
|
2214111025 LiYujia 75 89 100 264 88
|
|
|
|
|
|
|
|
|
|
|
|
1 Input record
|
|
|
|
|
|
2 Calculate total and average score of every course
|
|
|
|
|
|
3 Calculate total and average score of every student
|
|
|
|
|
|
4 Sort in descending order by score
|
|
|
|
|
|
5 Sort in ascending order by score
|
|
|
|
|
|
6 Sort in ascending order by number
|
|
|
|
|
|
7 Sort in dictionary order by name
|
|
|
|
|
|
8 Search by number
|
|
|
|
|
|
9 Search by name
|
|
|
|
|
|
10 Statistic analysis
|
|
|
|
|
|
11 List record
|
|
|
|
|
|
12 Write to a file
|
|
|
|
|
|
13 Read from a file
|
|
|
|
|
|
0 Exit
|
|
|
|
|
|
|
|
|
|
|
|
Please Input your choice: 9
|
|
|
|
|
|
Input the name you want to search:SunYizhe
|
|
|
|
|
|
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
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
Please Input your choice: 10
|
|
|
|
|
|
For course 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
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
Please Input your choice: 11
|
|
|
|
|
|
2214111006 XuZilin 100 95 86 281 93
|
|
|
|
|
|
2214111009 XuZigui 77 89 99 265 88
|
|
|
|
|
|
2214111011 ZhangYu 85 91 98 274 91
|
|
|
|
|
|
2214111025 LiYujia 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
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
Please Input your choice: 12
|
|
|
|
|
|
Failure to open score.txt!
|
|
|
|
|
|
|
|
|
|
|
|
1 Input record
|
|
|
|
|
|
2 Calculate total and average score of every course
|
|
|
|
|
|
3 Calculate total and average score of every student
|
|
|
|
|
|
4 Sort in descending order by score
|
|
|
|
|
|
5 Sort in ascending order by score
|
|
|
|
|
|
6 Sort in ascending order by number
|
|
|
|
|
|
7 Sort in dictionary order by name
|
|
|
|
|
|
8 Search by number
|
|
|
|
|
|
9 Search by name
|
|
|
|
|
|
10 Statistic analysis
|
|
|
|
|
|
11 List record
|
|
|
|
|
|
12 Write to a file
|
|
|
|
|
|
13 Read from a file
|
|
|
|
|
|
0 Exit
|
|
|
|
|
|
|
|
|
|
|
|
Please Input your choice: 12
|
|
|
|
|
|
2214111006 XuZilin 100 95 86 281 93
|
|
|
|
|
|
2214111009 XuZigui 77 89 99 265 88
|
|
|
|
|
|
2214111011 ZhangYu 85 91 98 274 91
|
|
|
|
|
|
2214111025 LiYujia 75 89 100 264 88
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
### 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
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
Please Input your choice: 13
|
|
|
|
|
|
Failure to open score.txt!
|
|
|
|
|
|
|
|
|
|
|
|
1 Input record
|
|
|
|
|
|
2 Calculate total and average score of every course
|
|
|
|
|
|
3 Calculate total and average score of every student
|
|
|
|
|
|
4 Sort in descending order by score
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5 Sort in ascending order by score
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6 Sort in ascending order by number
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7 Sort in dictionary order by name
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8 Search by number
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9 Search by name
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10 Statistic analysis
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11 List record
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12 Write to a file
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13 Read from a file
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0 Exit
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Please Input your choice: 13
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2214111006 XuZilin 100 95 86 281 93
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2214111009 XuZigui 77 89 99 265 88
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2214111011 ZhangYu 85 91 98 274 91
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2214111025 LiYujia 75 89 100 264 88
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```
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