C语言学生信息管理系统(附源码)

1、学生信息管理系统#include<stdio.h>#include<stdlib.h>#include<conio.h>#include<dos.h>#include<string.h>#define LEN sizeof(struct student)#define FORMAT "%-12d%-12s%-13.1f%-13.1f%-13.1f%-13.1fn"#define DATA stui.num,,stui.chinese,stui.math,stui.english,stui.sum/

2、*定义学生成绩结构体*/struct studentint num;char name15;float chinese;float math;float english;float sum;struct student stu50;/*函数声明与简介*/void input();void show();void order();void del();void modify();void menu();void insert();void total();void search();int chcode();/*主函数*/int main()int n;int login = chcode();

3、if(!login)printf("登录失败!n");return 0;printf("登录成功!n");menu();scanf("%d",&n);while(n)switch(n) case 0: exit(0);case 1: input();break; case 2: search();break; case 3: del();break; case 4: modify();break; case 5: insert();break; case 6: order();break; case 7: total();br

4、eak; case 8: show();break; default:printf("输入有误，请重新输入：");break;getch();menu();scanf("%d",&n);return 0;/*自定义函数实现菜单功能*/void menu()system("cls");printf("tt|-学生信息系统-|n");printf("tt| |n");printf("tt| 0. 退出系统ttt |n");printf("tt| 1. 输入记录t

5、tt |n");printf("tt| 2. 查找记录ttt |n");printf("tt| 3. 删除记录ttt |n");printf("tt| 4. 修改记录ttt |n");printf("tt| 5. 插入记录ttt |n");printf("tt| 6. 记录排序ttt |n");printf("tt| 7. 记录个数ttt |n");printf("tt| 8. 显示记录ttt |n");printf("tt|-|nn&

6、quot;);printf("tt请输入你的操作（0-8）：");/*录入学生信息*/void input()int i,m=0;char ch2;FILE *fp;/*定义指针文件*/if(fp=fopen("stuData.tet","a+")=NULL)printf("打开文件失败n");return;while(!feof(fp)if(fread(&stum,LEN,1,fp)=1)m+;fclose(fp);if(m=0)printf("没有数据！n");elsesystem(

7、"cls");show();if(fp=fopen("stuData.txt","wb")=NULL)printf("打开文件失败n");return;for(i=0;i<m;i+)fwrite(&stui,LEN,1,fp);printf("请确认(y/n):");scanf("%s",ch);while(strcmp(ch,"Y")=0|strcmp(ch,"y")=0)printf("学号：");

8、scanf("%d",&stum.num);for(i=0;i<m;i+)if(stui.num=stum.num)printf("此学号已存在！");getch();fclose(fp);return;printf("姓名：");scanf("%s",);printf("语文成绩：");scanf("%f",&stum.chinese);printf("数学成绩：");scanf("%f",&a

9、mp;stum.math);printf("英语成绩：");scanf("%f",&stum.english);stum.sum=stum.chinese+stum.math+stum.english;if(fwrite(&stum,LEN,1,fp)!=1)printf("保存失败！");getch();elseprintf("%s 已保存！n",);m+;printf("是否继续？（y/n）:");scanf("%s",ch);fclos

10、e(fp);printf("操作成功！n");/*自定义查找*/void search()FILE *fp;int snum,i,m=0;char ch2;if(fp=fopen("stuData.txt","rb")=NULL)printf("打开文件失败n");return;while(!feof(fp)if(fread(&stum,LEN,1,fp)=1)m+;fclose(fp);if(m=0)printf("文件无记录!n");return;printf("请输入需要

11、查找的学生学号：");scanf("%d",&snum);for(i=0;i<m;i+)if(snum=stui.num)printf("学生数据已找到，确认显示？（y/n）");scanf("%s",ch);if(strcmp(ch,"Y")=0|strcmp(ch,"y")=0)printf("学号 姓名 语文 数学 英语 总分tn");printf(FORMAT,DATA);break;if(i=m)printf("查找失败！n&quo

12、t;); /*自定义删除*/void del()FILE*fp;int snum,i,j,m=0;char ch2;if(fp=fopen("stuData.tet","r+")=NULL)printf("打开文件失败n");return;while(!feof(fp)if(fread(&stum,LEN,1,fp)=1)m+;fclose(fp);if(m=0)printf("文件无记录！n");return;show();printf("请输入需要删除的学生学号：");scanf(&

13、quot;%d",&snum);for(i=0;i<m;i+)if(snum=stui.num)printf("数据已经找到，是否确认删除？(y/n)");scanf("%s",ch);if(strcmp(ch,"Y")=0|strcmp(ch,"y")=0)for(j=i;j<m;j+)stuj=stui;m-;if(fp=fopen("stuData.txt","wb")=NULL)printf("打开文件失败n");re

14、turn;for(j=0;j<m;j+)if(fwrite(&stuj,LEN,1,fp)!=1)printf("对不起，保存失败！n");getch();fclose(fp);printf("删除成功！n");return;elseprintf("取消删除！n");return;printf("没有找到要删除的信息！n");/*自定义修改函数*/void modify()FILE *fp;int i,j,m=0,snum;if(fp=fopen("stuData.txt",&qu

15、ot;r+")=NULL)printf("打开文件失败n");return;while(!feof(fp)if(fread(&stum,LEN,1,fp)=1)m+;if(m=0)printf("文件无记录！n");fclose(fp);return;show();printf("请输入你要修改的的学生学号n");printf("学号是：");scanf("%d",&snum);for(i=0;i<m;i+)if(snum=stui.sum)printf(&quo

16、t;学生数据已找到，请修改!n");printf("name");scanf("%s",);printf("chinese");scanf("%f",&stui.chinese);printf("math:");scanf("%f",&stui.chinese);printf("english:");scanf("%f",&stui.english);printf("modi

17、fy successful!");stui.sum=stui.chinese+stui.math+stui.english;if(fp=fopen("stuData.txt","wb")=NULL)printf("保存失败！");getch();fclose(fp);return;printf("没有找到匹配信息");/*自定义插入函数*/void insert()FILE *fp;int i,j,k,m=0,snum;if(fp=fopen("stuData.txt","r

18、+")=NULL)printf("打开文件失败n");return;while(!feof(fp)if(fread(&stum,LEN,1,fp)=1)m+;if(m=0)printf("没有数据！n");fclose(fp);return;printf("请输入数据插入的位置：n");scanf("%d",&snum);for(i=0;i<m;i+)if(snum=stui.num)break;for(j=m-1;j>i;j-)stuj+i=stuj;printf("

19、;请输入待插入数据信息.n");printf("学号");scanf("%d",&stui+1.num);for(k=0;k<m;k+)if(stuk.num=stum.num)printf("此学号已存在！");getch();fclose(fp);return;printf("姓名");scanf("%s",stui+1.name);printf("语文成绩：");scanf("%f",&stui+1.chinese);

20、printf("数学成绩：");scanf("%f",&stui+1.math);printf("英语成绩：");scanf("%f",&stui+1.english);stui+1.sum=stui+1.chinese+stui+1.math+stui+1.english;if(fp=fopen("stuData.txt","wb")=NULL)printf("打开文件失败n");return;for(k=0;k<=m;k+)if(

21、fwrite(&stuk,LEN,1,fp)!=1)printf("保存失败！");getch();return;printf("插入函数成功！");getch();fclose(fp);/*自定义排序函数*/void order()FILE *fp;struct student t;int i=0,j=0,m=0;if(fp=fopen("stuData.txt","r+")=NULL)printf("打开文件失败！n");return;while(!feof(fp)if(fread(

22、&stum,LEN,1,fp)=1)m+;fclose(fp);if(m=0)printf("无记录！n");return;if(fp=fopen("stuData.txt","wb")=NULL)printf("打开文件失败n");return;for(i=0;i<m-1;i+)if(fwrite(&stui,LEN,1,fp)!=1)printf("%s 保存失败！n");getch();fclose(fp);printf("操作成功n");/*显示学生总人数*/void total()FILE *fp;int m=0;if(fp=fopen("stuData.txt","r+")=NULL)printf("打开文件失败n");return;while(!feof(fp)if(fread(&stum,LEN,1,fp)=1)m+;if(m=0)printf("文件无记录！n");fclose(fp);return;printf("学生总数为 %d 位！n",m);fc