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18
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README.md
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# 学生成绩管理系统
# text4
2023年4月23日
王振宇 李文菲 武杭凯 李培毅
## 项目简介
本学生成绩管理系统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，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。
下载地址：https://bdgit.educoder.net/p2i3t8vuh/text4.git
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：
|任务 |设计 |开发 |测试 |文档 |
|-----|-----|-----|-----|-----|
|驱动C1到C3及显示菜单，并读取用户输入 ||||王振宇|
|显示菜单并获得用户键盘输入的选项||||李文菲|
|输入n个学生的m门课成绩 ||||武杭凯|
计算每个学生各门课程的总分和平均分 ||||李培毅|
每个成员的工作量（百分比）：
|王振宇|李文菲|武杭凯|李培毅|
|------|------|------|------|
| 30 | 25 | 20 | 25 |
## 关于学生成绩管理系统
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、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：
数据的读取、保存、打印、查询、修改、插入、删除、排序和图表展示。
系统的非功能性需求：
菜单驱动的命令行交互界面。
## 需求分析
分析系统的功能需求和界面需求，编制用户手册如下
#### C1启动程序
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
~~~
库存管理系统启动
| 1 录入 | 2 计算 | 0 退出
请选择：
~~~
#### C2: 显示命令菜单
~~~
| 1 录入 | 2 计算 | 0 退出
请选择：
~~~
#### C3: 退出程序
选择菜单命令 0 ，退出程序
~~~
请选择：0
程序退出
~~~
#### C4：添加学生成绩
~~~
请选择：1
输入学生序号：1
输入学科序号：4
输入成绩：100
学生1成绩 已添加
| 1 录入 | 2 计算 | 0 退出
请选择： 1
输入学生序号：1
输入学科序号：4
学生成绩已存在
~~~
#### C5：计算每个学生各门课程的总分和平均分
~~~
请选择：2
输出序号：1
输出各门课程的总分：4，100
输出各门课程的平均分：4，100
~~~
## 概要设计
系统主要分为用户界面和数据处理两大模块。
用户界面模块包括系统初始化（init），显示菜单（display_menu），选择菜单命令（make_choice）、确认（confirm）、退出（quit）等子模块。
数据处理模块包括数据输入(ReadScore)，数据计算(AverSumofEveryStudent)等模块组成。
上述各模块通过主程序（main）进行调用，系统模块图如下。
![](流程图.png)
各模块的主要功能如下：
#####main
系统主函数模块，显示菜单，根据用户选择的菜单命令，执行相关操作。
#####init
系统初始化。
#####display_menu
显示菜单命令。
####详细设计
![](text.drawio.svg)
#####add_data
Step 1: if 数据库满 then 提示数据库满并结束
Step 2: 输入零件编号
Step 3: if 学生成绩已存在 then 提示学生成绩已存在并结束
Step 4: 输入学生名和学科
Step 5: 添加新成绩到数据
Step 6: 提示添加成功
![](流程图（2）.png)

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14
void
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// 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]);
}
/* ----------- end ----------- */
}

83
学生成绩管理系统代码.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_LEN 10 // 字符串最大长度
#define STU_NUM 30 // 最多的学生人数
#define COURSE_NUM 6 // 最多的考试科目数
typedef struct student
{
long num; // 每个学生的学号
char name[MAX_LEN]; // 每个学生的姓名
float score[COURSE_NUM]; // 每个学生COURSE_NUM门功课的成绩
float sum; // 每个学生的总成绩
float aver; // 每个学生的平均成绩
}STU;
int Menu(void);
void ReadScore(STU stu[], int n, int m);
void AverSumofEveryStudent(STU stu[], int n, int m);
int main(void)
{
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)
{
ch = Menu(); // 显示菜单，并读取用户输入
switch (ch)
{
case 1:ReadScore(stu, n, m);
break;
case 2: AverSumofEveryStudent(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("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]);
}
/* ----------- end ----------- */
}
// 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)
{
int i, j;
for (i=0; i<n; i++)
{
stu[i].sum = 0;
for (j=0; j<m; j++)
{
stu[i].sum = stu[i].sum + stu[i].score[j];
}
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);
}
}

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