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.vscode/tasks.json vendored

@ -1,28 +0,0 @@
{
"tasks": [
{
"type": "cppbuild",
"label": "C/C++: gcc.exe 生成活动文件",
"command": "D:\\mingw64\\bin\\gcc.exe",
"args": [
"-fdiagnostics-color=always",
"-g",
"${file}",
"-o",
"${fileDirname}\\${fileBasenameNoExtension}.exe"
],
"options": {
"cwd": "${fileDirname}"
},
"problemMatcher": [
"$gcc"
],
"group": {
"kind": "build",
"isDefault": true
},
"detail": "调试器生成的任务。"
}
],
"version": "2.0.0"
}

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本系统是程序设计与问题求解课程设计项目,是为教师提供管理班级成绩的工具,该系统可以实现的对学生的成绩进行增、删、改、查、信息保存和信息导入等基本功能,以及对学生成绩排序和分段的扩展功能,有利于对学生成绩管理。项目采用 C 语言编程实现,在 VS Code 集成开发环境IDE中用 GCC 进行编译。系统采用模块化设计,程序结构清晰,采用菜单驱动的命令行界面,操作便捷,能够用 CSV 格式读取和保存数据,通用性强,能够用图表展示数据,直观清楚。 本系统是程序设计与问题求解课程设计项目,是为教师提供管理班级成绩的工具,该系统可以实现的对学生的成绩进行增、删、改、查、信息保存和信息导入等基本功能,以及对学生成绩排序和分段的扩展功能,有利于对学生成绩管理。项目采用 C 语言编程实现,在 VS Code 集成开发环境IDE中用 GCC 进行编译。系统采用模块化设计,程序结构清晰,采用菜单驱动的命令行界面,操作便捷,能够用 CSV 格式读取和保存数据,通用性强,能够用图表展示数据,直观清楚。
下载地址https://code.educoder.net/plebkff6w/text3 下载地址https://code.educoder.net/plebkff6w/text3/tree
项目开发过程中采用 Kanban看板进行任务管理和分工协作并使用 Git 对程序代码和文档进行版 项目开发过程中采用 Kanban看板进行任务管理和分工协作并使用 Git 对程序代码和文档进行版
本管理。任务分工情况如下: 本管理。任务分工情况如下:
@ -16,25 +16,26 @@
| 任务 | 设计 | 开发 | 测试 | 文档 | | 任务 | 设计 | 开发 | 测试 | 文档 |
|---|---|---|---|---| |---|---|---|---|---|
| C1-C3 菜单驱动的用户界面 | 董函铄 | 董函铄 | 胡煜男 | 董函铄 | | C1-C3 菜单驱动的用户界面 | 董函铄 | 董函铄 | 胡煜男 | 董函铄 |
| C4 添加学生信息及成绩 | 胡煜男 | 胡煜男 | 于博 | 胡煜男 | | C4 添加库存记录 | 胡煜男 | 胡煜男 | 于博 | 胡煜男 |
| C5: 查询学生信息及成绩 | 于博 | 于博 | 袁楷昊 | 于博 | | C5: 查询库存记录 | 于博 | 于博 | 袁楷昊 | 于博 |
| C6: 打印学生信息及成绩 | 袁楷昊 | 袁楷昊 | 董函铄 | 袁楷昊 | | C6: 打印库存列表 | 袁楷昊 | 袁楷昊 | 董函铄 | 袁楷昊 |
| C7: 修改学生信息及成绩 | 董函铄 | 董函铄 | 于博 | 董函铄 | | C7: 修改库存记录 | 董函铄 | 董函铄 | 于博 | 董函铄 |
| C8: 删除学生信息及成绩 | 胡煜男 | 胡煜男 | 袁楷昊 | 胡煜男| | C8: 删除库存记录 | 胡煜男 | 胡煜男 | 袁楷昊 | 胡煜男|
| C9: 学生信息及成绩记录排序 | 于博 | 于博 | 董函铄 | 于博 | | C9: 库存记录排序 | 于博 | 于博 | 董函铄 | 于博 |
| C10: 从文件中读取学生信息及成绩记录 | 袁楷昊 | 袁楷昊 | 胡煜男 | 袁楷昊 | | C10: 从文件中读取库存记录 | 袁楷昊 | 袁楷昊 | 胡煜男 | 袁楷昊 |
| C11: 将学生信息及成绩保存保存到文件 | 董函铄 | 于博 | 胡煜男 | 董函铄 | | C11: 将库存保存保存到文件 | 董函铄 | 于博 | 胡煜男 | 董函铄 |
| C12: 以图表方式显示学生信息及成绩 | 董函铄 | 袁楷昊 | 于博 | 胡煜男 | | C12: 以图表方式显示库存记录 | 董函铄 | 袁楷昊 | 于博 | 胡煜男 |
每个成员的工作量(百分比): 每个成员的工作量(百分比):
| 董函铄 | 胡煜男 | 于博 | 袁楷昊 | | 董函铄 | 胡煜男 | 于博 | 袁楷昊 |
|---|---|---|---| |---|---|---|---|
| 30 | 20 | 30 | 20 | | 25 | 25 | 25 | 25 |
## 关于实现学生成绩管理系统 ## 关于实现学生成绩管理系统
设计一个学生成绩管理系统,要求采用命令行菜单界面进行交互,具备读取、保存、打印、查询、修改、插入、删除和排序等基本功能,能够以表格和图表形式展示数据,采用 CSV 格式保存数据。 设计一个学生成绩管理系统,要求采用命令行菜单界面进行交互,具备读取、保存、打印、查询、修
改、插入、删除和排序等基本功能,能够以表格和图表形式展示数据,采用 CSV 格式保存数据。
系统的功能性需求: 系统的功能性需求:
@ -53,7 +54,7 @@
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。 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。
``` ```
学生成绩管理系统启动 库存管理系统启动
1 读取 | 2 保存 | 3 打印 | 4 查询 | 5 添加 1 读取 | 2 保存 | 3 打印 | 4 查询 | 5 添加
6 修改 | 7 删除 | 8 排序 | 9 图表 | 0 退出 6 修改 | 7 删除 | 8 排序 | 9 图表 | 0 退出
@ -61,6 +62,7 @@
请选择: 请选择:
``` ```
#### C2显示命令菜单 #### C2显示命令菜单
``` ```
@ -70,6 +72,8 @@
请选择: 请选择:
``` ```
#### C3: 退出程序 #### C3: 退出程序
选择菜单命令 `0`,再输入 `y` 确认,则退出程序。 选择菜单命令 `0`,再输入 `y` 确认,则退出程序。
@ -79,27 +83,26 @@
确定要退出吗?(Y/N): y 确定要退出吗?(Y/N): y
程序退出 程序退出
``` ```
#### C4: 添加库存记录
#### C4: 添加学生信息及成绩 选择菜单命令 `5`,提示输入学号,若该学生不存在,则继续输入学号、姓名、成绩,添加学号,并提示完成;若学号已存在,则提示学号已存在,并结束。
选择菜单命令 `3`,提示输入学号,若该学生不存在,则继续输入学号、姓名、成绩,添加学号,并提示完成;若学号已存在,则提示学号已存在,并结束。
``` ```
请选择:3 请选择:5
输入学号102 输入学号101
输入姓名:小米 输入姓名:小米
输入成绩:70 输入成绩:80
学生 102 已添加 学生 101 已添加
1 读取 | 2 保存 | 3 打印 | 4 查询 | 5 添加 1 读取 | 2 保存 | 3 打印 | 4 查询 | 5 添加
6 修改 | 7 删除 | 8 排序 | 9 图表 | 0 退出 6 修改 | 7 删除 | 8 排序 | 9 图表 | 0 退出
请选择:3 请选择:5
输入学号102 输入学号101
学号已存在. 学号已存在.
``` ```
#### C5: 查询学生信息及成绩 #### C5: 查询库存记录
选择菜单命令 `4`,提示输入学号,若该学号存在,则输出学号、姓名、成绩;否则提示学生不存在并结束。 选择菜单命令 `4`,提示输入学号,若该学号存在,则输出学号、姓名、成绩;否则提示学生不存在并结束。
@ -114,12 +117,12 @@
6 修改 | 7 删除 | 8 排序 | 9 图表 | 0 退出 6 修改 | 7 删除 | 8 排序 | 9 图表 | 0 退出
请选择4 请选择4
输入学号101 输入学号100
学号不存在. 学号不存在.
``` ```
#### C6: 打印学生信息及成绩 #### C6: 打印库存列表
选择菜单命令 `3`,打印 选择菜单命令 `3`,打印
@ -128,14 +131,14 @@
------------------------------------------------------- -------------------------------------------------------
| NUMBER | NAME | ON HAND | | NUMBER | NAME | ON HAND |
------------------------------------------------------- -------------------------------------------------------
| 101 | 小 | 80 | | 101 | 小 | 80 |
------------------------------------------------------- -------------------------------------------------------
``` ```
#### C7: 修改学生信息及成绩 #### C7: 修改库存记录
选择菜单命令 `7`,根据提示输入学号,若学号存在,则继续输入学号、姓名、成绩,并修改库存记录;否则,提示学号不存在并结束。 选择菜单命令 `6`,根据提示输入学号,若学号存在,则继续输入学号、姓名、成绩,并修改库存记录;否则,提示学号不存在并结束。
``` ```
请选择7 请选择7
@ -151,19 +154,18 @@
------------------------------------------------------- -------------------------------------------------------
| NUMBER | NAME | ON HAND | | NUMBER | NAME | ON HAND |
------------------------------------------------------- -------------------------------------------------------
| 104 | 小刘 | 96 | | 104 | 小刘 | 90 |
------------------------------------------------------- -------------------------------------------------------
1 读取 | 2 保存 | 3 打印 | 4 查询 | 5 添加 1 读取 | 2 保存 | 3 打印 | 4 查询 | 5 添加
6 修改 | 7 删除 | 8 排序 | 9 图表 | 0 退出 6 修改 | 7 删除 | 8 排序 | 9 图表 | 0 退出
请选择:7 请选择:6
输入学号104 输入学号100
学生不存在. 学生不存在.
``` ```
#### C8: 删除库存记录
#### C8: 删除学生信息及成绩
选择菜单命令 `7`,根据提示输入学号,若学号存在,则删除之;否则提示学号不存在并结束。 选择菜单命令 `7`,根据提示输入学号,若学号存在,则删除之;否则提示学号不存在并结束。
@ -190,7 +192,7 @@
``` ```
#### C9: 学生信息及成绩排序 #### C9: 库存记录排序
选择菜单命令 `8`,对学生按学号从小到大排序。 选择菜单命令 `8`,对学生按学号从小到大排序。
@ -223,14 +225,14 @@
``` ```
#### C10: 从文件中读取学生信息及成绩 #### C10: 从文件中读取库存记录
选择菜单命令 `1`,提示输入文件名,若文件存在,则打开文件读取 CSV 格式保存的所有库存记录;否则,若文件不存在,则给出错误信息并结束。 选择菜单命令 `1`,提示输入文件名,若文件存在,则打开文件读取 CSV 格式保存的所有库存记录;否则,若文件不存在,则给出错误信息并结束。
假设文件 `a.csv` 中,以 CSV Comma-Separated Values格式保存了如下记录 假设文件 `a.csv` 中,以 CSV Comma-Separated Values格式保存了如下记录
``` ```
103,小,80 103,小,80
104,小光,100 104,小光,100
101,小米,80 101,小米,80
102,小明,70 102,小明,70
@ -251,7 +253,7 @@
------------------------------------------------------- -------------------------------------------------------
| NUMBER | NAME | ON HAND | | NUMBER | NAME | ON HAND |
------------------------------------------------------- -------------------------------------------------------
| 103 | 小 | 80 | | 103 | 小 | 80 |
| 104 | 小光 | 100 | | 104 | 小光 | 100 |
| 101 | 小米 | 80 | | 101 | 小米 | 80 |
| 102 | 小明 | 70 | | 102 | 小明 | 70 |
@ -267,7 +269,7 @@ a: No such file or directory
``` ```
#### C11: 将学生信息及成绩保存到文件 #### C11: 将库存保存保存到文件
选择菜单命令 `2`,提示输入文件名,将所有库存记录以 CSV 格式保存到指定的文件中。 选择菜单命令 `2`,提示输入文件名,将所有库存记录以 CSV 格式保存到指定的文件中。
@ -279,14 +281,14 @@ a: No such file or directory
``` ```
#### C12: 以图表方式显示学生信息及成绩 #### C12: 以图表方式显示库存记录
选择菜单命令 `9`,以图表方式显示库存记录。 选择菜单命令 `9`,以图表方式显示库存记录。
``` ```
请选择9 请选择9
图表 图表
103 : 小 | ******** (80) 103 : 小 | ******** (80)
104 : 小光 | ************ (100) 104 : 小光 | ************ (100)
101 : 小米 | ******************** (80) 101 : 小米 | ******************** (80)
102 : 小明 | ********** (70) 102 : 小明 | ********** (70)
@ -295,7 +297,6 @@ a: No such file or directory
6 修改 | 7 删除 | 8 排序 | 9 图表 | 0 退出 6 修改 | 7 删除 | 8 排序 | 9 图表 | 0 退出
``` ```
## 概要设计 ## 概要设计
系统主要分为用户界面和数据处理两大模块。 系统主要分为用户界面和数据处理两大模块。
@ -304,7 +305,19 @@ a: No such file or directory
上述各模块通过主程序main进行调用系统模块图如下。 上述各模块通过主程序main进行调用系统模块图如下。
![1](./1.png)
各模块的主要功能如下: 各模块的主要功能如下:
@ -320,6 +333,7 @@ a: No such file or directory
显示菜单命令。 显示菜单命令。
## 详细设计 ## 详细设计
针对概要设计 针对概要设计
@ -341,17 +355,7 @@ Step 2.10: if c == CMD_SORT then 排序数据
Step 2.11: if c == CMD_MAKE then 显示图表 Step 2.11: if c == CMD_MAKE then 显示图表
Step 2.12: if c == CMD_QUIT then 退出 Step 2.12: if c == CMD_QUIT then 退出
![cc9d4a3c669029521483c666695b97e](./cc9d4a3c669029521483c666695b97e.png)
#### read_data
Step 1: 输入文件名
Step 2: 打开文件
Step 3: if 文件为空 then 结束
Step 4: else 读取文件
Step 5: 提示读取并记录
![mmm](./mmm.png)
#### save_data #### save_data
@ -361,20 +365,8 @@ Step 3: if 打开文件失败 then 提示打开文件失败并结束
Step 4: 将所有库存记录写入文件 Step 4: 将所有库存记录写入文件
Step 5: 关闭文件 Step 5: 关闭文件
![save](./save.png)
#### print_data
Step 1: 输出学号、姓名、成绩
![print](./print.png)
#### query_data
Step 1: 输入学生学号
Step 2: if学号不存在 then 提示学生不存在并结束
Step 3: else 学号存在 then 输出学号、姓名、成绩
![query](./query.png)
#### add_data #### add_data
Step 1: if 数据库满 then 提示数据库满并结束 Step 1: if 数据库满 then 提示数据库满并结束
@ -383,35 +375,56 @@ Step 3: if 学生已存在 then 提示学生已存在并结束
Step 4: 输入学生名字和成绩 Step 4: 输入学生名字和成绩
Step 5: 添加学生到数据 Step 5: 添加学生到数据
Step 6: 提示添加成功 Step 6: 提示添加成功
![add](./add.png)
#### query_data
Step 1: 输入学生学号
Step 2: if学号不存在 then 提示学生不存在并结束
Step 3: else 学号存在 then 输出学号、姓名、成绩
#### print_data
Step 1: 输出学号、姓名、成绩
#### update_data #### update_data
Step 1: 输入学号 Step 1: 输入学号
Step 2: if 不存在 then 提示学生不存在并结束 Step 2: if 不存在 then 提示学生不存在并结束
Step 3: else 输入学号、姓名、成绩 Step 3: else 输入学号、姓名、成绩
Step 4: 已更新 Step 4: 已更新
![update](./updata.png)
#### delete_data #### delete_data
Step 1: 输入学号 Step 1: 输入学号
Step 2: if 不存在 then 提示学生不存在并结束 Step 2: if 不存在 then 提示学生不存在并结束
Step 3: else 删除学生信息 Step 3: else 删除学生信息
Step 4: 提示删除成功 Step 4: 提示删除成功
![delete](./delete.png)
#### read_data
Step 1: 输入文件名
Step 2: 打开文件
Step 3: if 文件为空 then 结束
Step 4: else 读取文件
Step 5: 提示读取并记录
#### sort_data #### sort_data
Step 1: 读取文件 Step 1: 读取文件
Step 2: 进行排序 Step 2: 进行排序
Step 3: 提示排序已完成 Step 3: 提示排序已完成
![2](./2.png)
#### make_chart #### make_chart
Step 1: 读取文件 Step 1: 读取文件
Step 2: 显示图表 Step 2: 显示图表
![3](./3.png)
#### confirm
Step 1: 输出 确定要退出吗
Step 2: if 确认 then 退出
![14](./14.png)

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#define NAME_LEN 31
#define MAX_PARTS 100
//保存学生成绩信息的结构
struct students
{
int number;
char name[NAME_LEN + 1];
int score;
};
static struct students stu[MAX_PARTS];
static int num_parts = 0;
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
//定义常量 #define MAX_LEN 10 // 字符串最大长度
#define CMD_QUIT 0 #define STU_NUM 30 // 最多的学生人数
#define CMD_QUERY 4 #define COURSE_NUM 6 // 最多的考试科目数
#define CMD_INSERT 5 typedef struct student
#define CMD_UPDATE 6 {
#define CMD_DELETE 7 long num; // 每个学生的学号
#define CMD_READ 1 char name[MAX_LEN]; // 每个学生的姓名
#define CMD_SAVE 2 float score[COURSE_NUM]; // 每个学生COURSE_NUM门功课的成绩
#define CMD_PRINT 3 float sum; // 每个学生的总成绩
#define CMD_SORT 8 float aver; // 每个学生的平均成绩
#define CMD_CHART 9 }STU;
// 菜单命令的编号 int Menu(void);
void ReadScore(STU stu[], int n, int m);
// 函数声明 void AverSumofEveryStudent(STU stu[], int n, int m);
void init(void); void AverSumofEveryCourse(STU stu[], int n, int m);
void quit(void); void SortbyScore(STU stu[],int n,int m,int (*compare)(float a,float b));
void display_menu(void); int Ascending(float a, float b);
int make_choice(void); int Descending(float a, float b);
void read_data(void); // 读取 void SwapFloat(float *x, float *y);
void save_data(void); // 保存 void SwapLong(long *x, long *y);
void print_data(void); // 打印 void SwapChar(char x[], char y[]);
void query_data(void); // 查询 void AsSortbyNum(STU stu[], int n, int m);
void add_data(void); // 添加 void SortbyName(STU stu[], int n, int m);
void update_data(void); // 修改 void SearchbyNum(STU stu[], int n, int m);
void delete_data(void); // 删除 void SearchbyName(STU stu[], int n, int m);
void sort_data(void); // 排序 void StatisticAnalysis(STU stu[], int n, int m);
void make_chart(void); // 图表 void PrintScore(STU stu[], int n, int m);
int confirm(const char *msg); void WritetoFile(STU record[], int n, int m);
void ReadfromFile(STU record[], int *n, int *m);
// 主程序
int main(void) int main(void)
{ {
init(); // 程序启动 char ch;
int n = 0, m = 0;
STU stu[STU_NUM];
printf("Input student number(n<%d):", STU_NUM);
scanf("%d", &n);
printf("Input course number(m<=%d):",COURSE_NUM);
scanf("%d", &m);
while (1) while (1)
{ {
display_menu(); ch = Menu(); // 显示菜单,并读取用户输入
int c = make_choice(); switch (ch)
switch (c)
{ {
case CMD_QUERY: case 1:ReadScore(stu, n, m);
query_data();
break; break;
case CMD_INSERT: case 2: AverSumofEveryCourse(stu, n, m);
add_data();
break; break;
case CMD_UPDATE: case 3: AverSumofEveryStudent(stu, n, m);
update_data();
break; break;
case CMD_DELETE: case 4: SortbyScore(stu, n, m, Descending);
delete_data(); printf("\nSort in descending order by score:\n");
PrintScore(stu, n, m);
break; break;
case CMD_READ: case 5: SortbyScore(stu, n, m, Ascending);
read_data(); printf("\nSort in ascending order by score:\n");
PrintScore(stu, n, m);
break; break;
case CMD_SAVE: case 6: AsSortbyNum(stu, n, m);
save_data(); printf("\nSort in ascending order by number:\n");
PrintScore(stu, n, m);
break; break;
case CMD_PRINT: case 7: SortbyName(stu, n, m);
print_data(); printf("\nSort in dictionary order by name:\n");
PrintScore(stu, n, m);
break; break;
case CMD_SORT: case 8: SearchbyNum(stu, n, m);
sort_data();
break; break;
case CMD_CHART: case 9: SearchbyName(stu, n, m);
make_chart();
break; break;
default: case 10: StatisticAnalysis(stu, n, m);
puts("命令错误,请重新选择");
break; break;
case CMD_QUIT: case 11:PrintScore(stu, n, m);
if (confirm("确定要退出吗?"))
quit(); // 仅在确认后退出
break; break;
} case 12:WritetoFile(stu, n, m);
} break;
return 0; case 13:ReadfromFile(stu, &n, &m);
break;
case 0: printf("End of program!");
exit(0);
default:printf("Input error!");
}
}
return 0;}
// 函数功能:显示菜单并获得用户键盘输入的选项
int Menu(void)
{
int itemSelected;
printf("Management for Students' scores\n");
printf("1.Input record\n");
printf("2.Calculate total and average score of every course\n");
printf("3.Calculate total and average score of every student\n");
printf("4.Sort in descending order by score\n");
printf("5.Sort in ascending order by score\n");
printf("6.Sort in ascending order by number\n");
printf("7.Sort in dictionary order by name\n");
printf("8.Search by number\n");
printf("9.Search by name\n");
printf("10.Statistic analysis\n");
printf("11.List record\n");
printf("12.Write to a file\n");
printf("13.Read from a file\n");
printf("0.Exit\n");
printf("Please Input your choice:");
scanf("%d", &itemSelected); // 读入用户输入
return itemSelected;
}
// 函数功能输入n个学生的m门课成绩
void ReadScore(STU stu[], int n, int m)
{
int i, j;
printf("Input student's ID, name and score:\n");
/* ---------- begain ---------- */
for(i=0;i<n;i++)
{scanf("%ld%s",&stu[i].num,stu[i].name);
for (j=0; j<m; j++)
scanf("%f",&stu[i].score[j]);
} }
// 函数定义 /* ----------- end ----------- */
void init(void)
{
puts("程序启动");
} }
void quit(void) // 函数功能:计算每个学生各门课程的总分和平均分
void AverSumofEveryStudent(STU stu[], int n, int m)
{ {
puts("程序退出"); int i, j;
exit(EXIT_SUCCESS); for (i=0; i<n; i++)
}
void display_menu(void)
{ {
printf("\n%d 读取 | %d 保存 | %d 打印 | %d 查询 | %d 添加\n%d 修改 | %d 删除 | %d 排序 | %d 图表 | %d 退出\n\n", CMD_READ, CMD_SAVE, CMD_PRINT, CMD_QUERY, CMD_INSERT, CMD_UPDATE, CMD_DELETE, CMD_SORT, CMD_CHART, CMD_QUIT); stu[i].sum = 0;
} for (j=0; j<m; j++)
int make_choice(void)
{
int c; // 用户输入
int n = 0; // 正确读入的数据项个数
while (n == 0)
{ {
printf("请选择:"); stu[i].sum = stu[i].sum + stu[i].score[j];
n = scanf("%d", &c); // 尝试读入整数 c
scanf("%*[^\n]"); // 跳过一行中剩余的字符
} }
return c; stu[i].aver = m>0 ? stu[i].sum / m : -1;
printf("student %d: sum = %.0f, aver = %.0f\n",
i+1, stu[i].sum, stu[i].aver);
} }
}
//查询 // 函数功能:计算每门课程的总分和平均分
void query_data(void) void AverSumofEveryCourse(STU stu[], int n, int m)
{ {
int num; int i, j;
printf("输入学生学号: "); float sum[COURSE_NUM], aver[COURSE_NUM];
scanf("%d", &num); /* ---------- begain ---------- */
int f = -1; for (j=0; j<m; j++)
for (int i = 0; i < num_parts; i++)
{ {
if (num == stu[i].number) sum[j] = 0;
for (i=0; i<n; i++)
{ {
f = i; sum[j] += stu[i].score[j];
break;
} }
aver[j]=sum[j]/i;
printf("student %d: sum = %.0f, aver = %.0f\n",
j+1, sum[j], aver[j]);
} }
if (f == -1) /* ----------- end ----------- */
{
printf("学生不存在");
} }
else // 函数功能按选择法将数组sum的元素值排序
void SortbyScore(STU stu[],int n,int m,int (*compare)(float a,float b))
{ {
printf("学生学号:%d\n", stu[f].number); int i, j, k, t;
printf("学生姓名:%s\n", stu[f].name); for (i=0; i<n-1; i++)
printf("学生成绩:%d\n", stu[f].score);
}
}
//打印
void print_data(void)
{ {
printf("NUMBER | NAME score\n"); k = i;
for (int i = 0; i < num_parts; i++) for (j=i+1; j<n; j++)
{ {
printf("%d | %s %d\n", stu[i].number, stu[i].name, stu[i].score); if ((*compare)(stu[j].sum, stu[k].sum)) k = j;
}
} }
if (k != i)
//添加
void add_data(void)
{ {
int num; for (t=0; t<m; t++) // 交换m门课程的成绩
printf("输入学生学号:");
scanf("%d", &num);
int f = 0;
for (int i = 0; i < num_parts; i++)
{ {
if (num == stu[i].number) SwapFloat(&stu[k].score[t], &stu[i].score[t]);
{
f = 1;
break;
} }
SwapFloat(&stu[k].sum, &stu[i].sum); // 交换总分
SwapFloat(&stu[k].aver, &stu[i].aver); // 交换平均分
SwapLong(&stu[k].num, &stu[i].num); // 交换学号
SwapChar(stu[k].name, stu[i].name); // 交换姓名
} }
if (f == 0)
{
stu[num_parts].number = num;
printf("输入学生姓名:");
scanf("%s", &stu[num_parts].name);
printf("输入学生成绩:");
scanf("%d", &stu[num_parts].score);
num_parts++;
printf("学生 %d 添加成功\n", num);
}
else
{
printf("学生已存在");
} }
} }
// 使数据按升序排序
//修改 int Ascending(float a, float b)
void update_data(void)
{ {
int num; return a < b; // 这样比较决定了按升序排序如果a<b则交换
printf("输入学生学号:");
scanf("%d", &num);
int f = 0;
for (int i = 0; i < num_parts; i++)
{
if (num == stu[i].number)
{
f = 1;
break;
}
} }
if (f == 0) // 使数据按降序排序
int Descending(float a, float b)
{ {
printf("学生不存在"); return a > b; // 这样比较决定了按降序排序如果a>b则交换
} }
else // 交换两个单精度浮点型数据
void SwapFloat(float *x, float *y)
{ {
printf("输入学生学号:"); float temp;
scanf("%d", &stu[num].number); temp = *x;
printf("输入学生姓名:"); *x = *y;
scanf("%s", stu[num].name); *y = temp;
printf("输入学生成绩:");
scanf("%d", &stu[num].score);
printf("学生 %d 已更新", num);
} }
// 交换两个长整型数据
void SwapLong(long *x, long *y)
{
long temp;
temp = *x;
*x = *y;
*y = temp;
} }
// 交换两个字符串
//删除 void SwapChar(char x[], char y[])
void delete_data(void)
{ {
int num; char temp[MAX_LEN];
printf("输入学生学号:"); strcpy(temp, x);
scanf("%d", &num); strcpy(x, y);
int f = 0, i, j; strcpy(y, temp);
for (i = 0; i < num_parts; i++) }
// 函数功能按选择法将数组num的元素值按从低到高排序
void AsSortbyNum(STU stu[], int n, int m)
{ {
if (num == stu[i].number) int i, j, k, t;
for (i=0; i<n-1; i++)
{ {
f = 1; /* ---------- begain ---------- */
break;
k=i;
for (j=i+1;j<10;j++){
if((*compare)(stu[k]num.stu[j].num)) k=j;}
if(k!=i){t=stu[i].num;stu[i].num=stu[k].num;stu[k].num=t;}
/* ----------- end ----------- */
} }
} }
if (f == 0) // 函数功能:交换法实现字符串按字典顺序排序
void SortbyName(STU stu[], int n, int m)
{ {
printf("学生不存在"); int i, j, t;
} for (i=0; i<n-1; i++)
else {
for (j = i+1; j<n; j++)
{
if (strcmp(stu[j].name, stu[i].name) < 0)
{ {
for (j = i; j < num_parts - 1; j++) for (t=0; t<m; t++)// 交换m门课程的成绩
{ {
stu[j] = stu[j + 1]; SwapFloat(&stu[i].score[t], &stu[j].score[t]);
} }
num_parts--; SwapFloat(&stu[i].sum, &stu[j].sum); // 交换总分
printf("删除成功"); SwapFloat(&stu[i].aver, &stu[j].aver); // 交换平均分
SwapLong(&stu[i].num, &stu[j].num); // 交换学号
SwapChar(stu[i].name, stu[j].name); // 交换姓名
} }
} }
}
void read_data(void) }
// 函数功能:按学号查找学生成绩并显示查找结果
void SearchbyNum(STU stu[], int n, int m)
{ {
puts("读取数据"); long number;
printf("请输入文件名"); int i, j;
char filename[256]; printf("Input the number you want to search:");
scanf("%s", filename); scanf("%ld", &number);
For(i=0;i<n;i++){
FILE *fp = fopen(filename, "r"); Ifstrcmp(number,stu[i].num)==0)
if (fp == NULL) printf("%ld\t%s\t", stu[i].num, stu[i].name);
for (j=0; j<m; j++)
{ {
perror(filename); printf("%.0f\t", stu[i].score[j]);
}
printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver);
return; return;
} }
int i = 0;
while (fscanf(fp, "%d,%[^,],%d", &stu[i].number, stu[i].name, &stu[i].score) == 3)
{
i++;
} }
fclose(fp); printf("\nNot found!\n");
num_parts = i;
printf("读取 %d 记录\n", num_parts);
} }
// 函数功能:按姓名的字典顺序排出成绩表
void save_data(void) void SearchbyName(STU stu[], int n, int m)
{ {
puts("保存数据"); char x[MAX_LEN];
printf(" 请输入文件名"); int i, j;
char filename[256]; printf("Input the name you want to search:");
scanf("%s", filename); scanf("%s", x);
FILE *fp = fopen(filename, "r"); for (i=0; i<n; i++)
if (fp == NULL)
{ {
perror(filename); if (strcmp(stu[i].name, x) == 0)
{
printf("%ld\t%s\t", stu[i].num, stu[i].name);
for (j=0; j<m; j++)
{
printf("%.0f\t", stu[i].score[j]);
}
printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver);
return; return;
} }
for (int i = 0; i < num_parts; i++)
{
fprintf(fp, "%d,%s,%d\n", stu[i].number, stu[i].name, stu[i].score);
} }
fclose(fp); printf("\nNot found!\n");
printf("保存%d 成功", num_parts);
} }
// 函数功能:统计各分数段的学生人数及所占的百分比
//排序 void StatisticAnalysis(STU stu[], int n, int m)
void sort_data(void)
{ {
printf("排序\n"); int i, j, t[6];
for (int i = 0; i < num_parts; i++) for (j=0; j<m; j++)
{ {
int change = 0; printf("For course %d:\n", j+1);
static struct students t; memset(t, 0, sizeof(t)); // 将数组t的全部元素初始化为0
for (int j = 0; j < num_parts - i - 1; j++) for (i=0; i<n; i++)
{ {
if (stu[j].number > stu[j + 1].number) if (stu[i].score[j]>=0 && stu[i].score[j]<60)t[0]++;
else if (stu[i].score[j]<70) t[1]++;
else if (stu[i].score[j]<80) t[2]++;
else if (stu[i].score[j]<90) t[3]++;
else if (stu[i].score[j]<100) t[4]++;
else if (stu[i].score[j] == 100) t[5]++;
}
for (i=0; i<=5; i++)
{ {
t = stu[j + 1]; if (i==0) printf("<60\t%d\t%.2f%%\n",t[i],(float)t[i]/n*100);
stu[j + 1] = stu[j]; else if (i==5) printf("%d\t%d\t%.2f%%\n",
stu[j] = t; (i+5)*10,t[i],(float)t[i]/n*100);
change = 1; else printf("%d-%d\t%d\t%.2f%%\n",
(i+5)*10, (i+5)*10+9, t[i], (float)t[i]/n*100);
} }
} }
if (!change)
break;
} }
for (int i = 0; i < num_parts; i++) // 函数功能: 打印学生成绩
void PrintScore(STU stu[], int n, int m)
{ {
int change = 0; int i, j;
static struct students t; for (i=0; i<n; i++)
for (int j = 0; j < num_parts - i - 1; j++)
{ {
if (stu[j].score > stu[j + 1].score) printf("%ld\t%s\t", stu[i].num, stu[i].name);
for (j=0; j<m; j++)
{ {
t = stu[j + 1]; printf("%.0f\t", stu[i].score[j]);
stu[j + 1] = stu[j];
stu[j] = t;
change = 1;
} }
printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver);
} }
if (!change)
break;
}
printf("排序已完成");
} }
// 输出n个学生的学号、姓名及m门课程的成绩到文件student.txt中
void WritetoFile(STU stu[], int n, int m)
{
FILE *fp;
int i, j;
void make_chart(void) if ((fp = fopen("student.txt","w")) == NULL)
{ {
printf("NUMBER | NAME score\n"); printf("Failure to open score.txt!\n");
for (int i = 0; i < num_parts; i++) exit(0);
}
fprintf(fp, "%d\t%d\n", n, m); //将学生人数和课程门数写入文件
for (i=0; i<n; i++)
{ {
printf("%d | %s ", stu[i].number, stu[i].name); fprintf(fp, "%10ld%10s", stu[i].num, stu[i].name);
for (int j = 0; j < stu[i].score; j++) for (j=0; j<m; j++)
{ {
printf("*"); fprintf(fp, "%10.0f", stu[i].score[j]);
} }
printf("\n"); fprintf(fp, "%10.0f%10.0f\n", stu[i].sum, stu[i].aver);
} }
printf("图表\n"); fclose(fp);
} }
//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
int confirm(const char *msg) void ReadfromFile(STU stu[],int *n, int *m)
{
FILE *fp;
int i, j;
if ((fp = fopen("student.txt","r")) == NULL)
{
printf("Failure to open score.txt!\n");
exit(0);
}
fscanf(fp, "%d\t%d", n, m); // 从文件中读出学生人数和课程门数
for (i=0; i<*n; i++) //学生人数保存在n指向的存储单元
{ {
char c = 'n'; // 默认选择是 no fscanf(fp, "%10ld", &stu[i].num);
printf("%s(Y/N): ", msg); // 提示输入 yes/no 进行确认 fscanf(fp, "%10s", stu[i].name);
scanf(" %c%*[^\n]", &c); // 读取第一个字符,忽略剩余字符 for (j=0; j<*m; j++)//课程门数保存在m指向的存储单元
return c == 'y' || c == 'Y'; // 返回确认结果 {
fscanf(fp, "%10f", &stu[i].score[j]); //不能用%10.0f
}
fscanf(fp, "%10f%10f", &stu[i].sum, &stu[i].aver);//不能用%10.0f
}
fclose(fp);
} }

@ -1,36 +0,0 @@
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>>>>>>> 456f225eb01b97142f653b827d7c303650179ba6
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