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@ -36,38 +36,13 @@
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分析系统的功能需求和界面需求,编制用户手册如下。
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分析系统的功能需求和界面需求,编制用户手册如下。
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### C1: 信息创建
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### C1: 启动程序
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创建学生基本信息,便于之后查询和浏览。利用结构体————定义STU结构体存储学生学号、姓名、各科成绩,总成绩和平均成绩,利用文件来存储,读取数据。
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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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```
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typedef struct student{
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Management for Students'scores
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long num; //每个学生的学号
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char name[MAX_LEN]; //每个学生的姓名
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float score[COURSE_NUM]; //每个学生COURSE_NUM门功课的成绩
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float sum; //每个学生的总成绩
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float aver; //每个学生的平均成绩
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}STU;
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```
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### C2: 成绩录入
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成绩录入时对结构体中班级、姓名、学号和五门成绩的录入,同时加上对五门成绩平均成绩的计算。按照基本的录入,只需用 scanf 函数对数据输入,用 printf 函数进行汉字的打印即可。然后进行文件保存该组数据,最后判断是否继续录入。
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```
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Input student number(n<%d):
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Input course number(m<=%d):
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```
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### C3:显示命令菜单
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显示菜单并获得用户键盘输入的选项
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```
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Management for Students' scores
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1 Input record
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1 Input record
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2 Calculate total and average score of every course
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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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3 Calculate total and average score of every student
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@ -82,98 +57,297 @@ Management for Students' scores
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12 Write to a file
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12 Write to a file
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13 Read from a file
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13 Read from a file
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0 Exit
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0 Exit
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Please Input your choice: //用户输入选项后将结果返回到主函数
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Please Input your choice:
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```
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```
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### C3: 计算每个学生各门课程的总分和平均分
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选择菜单命令2,通过学号查找到该学生的结构体,通过结构体找到各科的成绩,然后进行求和和平均
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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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```
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stu[i].sum+=stu[i].score[j];//求和
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Management for Students'scores
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stu[i].aver=stu[i].sum/m;//求平均
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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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```
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### C4: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,并将其按正确格式输出
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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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```
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student n:sum = ,aver =
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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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```
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### C5:按每个学生的总分由高到低排出名次表
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### C4: 添加学生信息
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选择菜单命令4,将结构体中的总分按降序排列,在此功能中需注意的是排序时要将整组数据随着总分一起改变,首先提示函数功能,然后输出每个同学各科成绩,总分,平均分,其间用Tab键分隔,并按总分高低逐个输出
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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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```
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Sort in descending order by score:
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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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```
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### C6:按每个学生的总分由低到高排出名次表
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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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选择菜单命令5,将结构体中的总分按升序排列,在此功能中需要注意的是将整组数据随着总分一起改变,首先提示函数功能是根据总分按升序排列,然后调用函数进行排序,最后输出每个同学各科成绩,总分,平均分,其间用Tab键分隔,并按总分低高逐个输出
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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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```
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Sort in ascending order by score:
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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
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Sort in descending order by score:
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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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### C7:按学号由小到大排出成绩表
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Please Input your choice: 5
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Sort in ascending order by score:
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2214111025 LiYujia 75 89 100 264 88
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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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2214111006 XuZilin 100 95 86 281 93
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```
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选择菜单命令6,将结构体中的学号按升序排序,在此功能中需要注意的是将整组数据随着学号一起改变,首先提示学号按升序排列,接着调用函数实现其功能,最后调用函数打印学生成绩
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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。
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```
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```
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Please Input your choice: 6
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Sort in ascending order by number:
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Sort in ascending order by number:
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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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```
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### C8:按姓名的字母顺序排出成绩表
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选择菜单命令7,将结构体中的姓名字母按一定顺序排序,在此功能中需要注意的是将整组数据随着姓名一起改变,首先调用函数实现其功能,接着提示姓名按升序排列,最后调用函数打印学生成绩
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### C9: 姓名顺序排序
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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。
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```
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```
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Please Input your choice: 7
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Sort in dictionary order by name:
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Sort in dictionary order by name:
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2214111025 LiYujia 75 89 100 264 88
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2214111009 XuZigui 77 89 99 265 88
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2214111006 XuZilin 100 95 86 281 93
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2214111011 ZhangYu 85 91 98 274 91
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```
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```
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### C9:按学号查询学生排名及其考试成绩
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选择菜单命令8,依据学号查找学生排名及考试成绩然后打印出来。输入学号,然后再循环体中对结构体进行遍历,如果找到所查找的结构体的下标值,将该下标值对应学生的信息打印出来。如果没有找到,则提示“Not found!"
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### C10: 学生信息查询
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- 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。
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```
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```
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Input the number you want to search:
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Please Input your choice: 8
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Input the number you want to search:2214111011
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2214111011 ZhangYu 85 91 98 274 91
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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: 8
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Input the number you want to search:2214111001
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Not found!
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Not found!
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```
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### C11:按姓名查询学生排名及考试成绩
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```
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选择菜单命令9,依据姓名查找学生排名及考试成绩然后打印出来。输入姓名,然后再循环体中对结构体进行遍历,如果找到所查找的结构体的下标值,将该下标值对应学生的信息打印出来。如果没有找到,则提示“Not found!"
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- 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。
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```
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```
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Input the name you want to search:
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Please Input your choice: 9
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Input the name you want to search:LiYujia
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2214111025 LiYujia 75 89 100 264 88
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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: 9
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Input the name you want to search:SunYizhe
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Not found!
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Not found!
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```
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### C11: 统计各分数段学生人数及所占百分比
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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
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```
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```
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Please Input your choice: 10
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For course 1:
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<60 0 0.00%
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60-70 0 0.00%
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70-80 2 50.00%
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80-90 1 25.00%
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90-100 0 0.00%
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100 1 25.00%
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For course 2:
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<60 0 0.00%
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60-70 0 0.00%
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70-80 0 00.00%
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80-90 2 50.00%
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90-100 2 50.00%
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100 0 0.00%
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For course 3:
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<60 0 0.00%
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60-70 0 0.00%
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70-80 0 0.00%
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80-90 1 25.00%
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90-100 2 50.00%
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100 1 25.00%
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### C12:统计各分数段的学生人数及所占的百分比
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```
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### C12: 打印学生信息
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按优秀(90-100)、良好(80-89)、中等(70-79)、及格(60-69)、不及格(0-59)5个类别,对每门课程分别统计每个类别的人数以及所占的百分比
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选择菜单命令11,打印
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```
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```
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Please Input your choice: 11
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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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```
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### C13:打印学生成绩
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### C13: 将学生信息保存在文件中
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输出每个学生的学号、姓名、各科考试成绩、以及每门课程的总分和平均分
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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
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```
|
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```
|
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|
Please Input your choice: 12
|
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|
|
Failure to open score.txt!
|
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|
|
|
|
|
|
|
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|
|
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
|
|
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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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|
|
|
```
|
|
|
|
```
|
|
|
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|
|
|
|
|
|
|
|
### C14:将每个学生的记录信息写入文件
|
|
|
|
### 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
|
|
|
|
|
|
|
|
|
|
|
|
### C15:从文件中读出每个学生的记录信息并显示
|
|
|
|
```
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
|
|
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: 13
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
## 功能设计
|
|
|
|
## 功能设计
|
|
|
|
|
|
|
|
|
|
|
|