C语言编写学生管理系统的代码

1、#include<stdio.h>#include<stdlib.h>#include<string.h>#include<ctype.h>#include<conio.h>struct student char number21;char name21; int age;char sex3; char birthday8;studentArray100;typedef struct student student;student studentArray100;char putout512="学号","

2、姓名","年龄","性别","出生年月" /为格式化输出做准备int count=0;/函数声明部分void explain();void readfile();void searchStudent();void modifyStudent();void addStudent();void delStudent();void printAllstudent();void save();void quit();void initial();void initial()FILE *fp;char choice='y

3、9;int i=0;fp=fopen("e:students.txt","r");if(!fp)printf("创建文件失败，即将返回n");return ;for(;fread(&studentArrayi,sizeof(struct student),1,fp)!=0;i+);count=i;/0、说明模块void explain()printf("n 很高兴能为您服务n");printf("n1.进入本系统，请先刷新学生信息，再查训n");printf("n2.您可以根据

4、自己需要的信息键入菜单上的编号n");printf("n3.修改学生信息后记得退出前保存信息，以免信息流失n");printf("n4.在各个子菜单里按提示操作n");printf("n5.谢谢您的使用及支持n");/1、刷新模块void readfile() char *p="students.txt" FILE *fp; int i=0; if(fp=fopen("students.txt","r")=NULL) printf("打开文件%s出错！请按

5、按任意键返回",p); system("pause"); return ; while(fscanf(fp,"%s %s %d %s %s",&studentArrayi.number,&studentA,&studentArrayi.age,&studentArrayi.sex,&studentArrayi.birthday)=5) i+; i=i; fclose(fp); printf("刷新完毕。n"); /2、查询模块void searchStudent()

6、 int i;int jb; FILE *fp;char studentNumber21;char studentName21;int flag=0;fp=fopen("e:students.txt","rb");if(count=0)printf("文件中还没有学生记录，请继续其他操作nn");return ;printf("1.按学号查询n"); printf("2.按姓名查询n");printf("3.不查询，退出n");while(1) printf("请选

7、择子菜单编号:"); scanf("%d",&jb); flag=0; switch(jb) case 1: printf("请输入要查询的学生的学号:n"); scanf("%s",&studentNumber); for(i=0;i<=count;i+)if(strcmp(studentNumber,studentArrayi.number)=0) flag=1;printf("要查找的学生相关信息如下:n");printf("学号 姓名 年龄 性别 出生年月n&quo

8、t;);printf("%s %8s %7d %4s %8sn",studentArrayi.number,studentA,studentArrayi.age,studentArrayi.sex,studentArrayi.birthday);printf("n");printf("n");if(flag=0)printf("没有找到学号为%s的学生n", studentNumber);printf("n");return ;return ;case 2: printf(&

9、quot;请输入要查询的学生的姓名:n"); fflush(stdin);scanf("%s",&studentName);for(i=0;i<=count;i+) if(strcmp(studentA,studentName)=0) flag=1;printf("要查找的学生相关信息如下:n");printf("学号 姓名 年龄 性别 出生年月n");printf("%s %8s %7d %4s %8sn",studentArrayi.number,studentArr

10、,studentArrayi.age,studentArrayi.sex,studentArrayi.birthday);printf("n");printf("n");if(flag=0)printf("没有找到名字为%s的学生n", studentName);printf("n");return ;case 3:return;/3、修改模块void modifyStudent()FILE *fp,*fp2;int flag=0;int i;int a,n;char studentNumber21

11、;/char c;student newdata;fp=fopen("e:students.txt","rb");if(count=0)printf("文件中还没有学生信息，即将退出nn");return ;fp2=fopen("e:test.txt","wb");if(!fp2)printf("文件创建失败，即将返回n"); return ;printf("输入要修改的学生的学号n");fflush(stdin);scanf("%s"

12、,&studentNumber);for(n=0;n<=count;n+)if(strcmp(studentArrayn.number,studentNumber)=0)a=n;for(i=0;fread(&studentArrayi,sizeof(struct student),1,fp)!=0;i+)if(!strcmp(studentArrayi.number,studentNumber)flag=1;printf("将要要修改的学生信息:n");printf("%s %8s %7d %4s %8sn",studentArra

13、ya.number,studentA,studentArraya.age,studentArraya.sex,studentArraya.birthday);printf("输入要修改后学生的学号、姓名、年龄、性别、出生年月，中间以空格隔开，回车键结束n");printf(" (学号格式:001) (出生年月格式:1995-03) n");fflush(stdin);scanf("%s%s%d%s%s",&newdata.number,&,&newdata.age,&

14、amp;newdata.sex,&newdata.birthday);fwrite(&newdata,sizeof(struct student),1,fp2);elsefwrite(&studentArrayi,sizeof(struct student),1,fp2);if(flag=0)printf("没有此人,即将退出nn");return ;fclose(fp);fclose(fp2);fp=fopen("e:students.txt","wb");fp2=fopen("e:test.txt

15、","rb");for(i=0;fread(&studentArrayi,sizeof(struct student),1,fp2)!=0;i+)fwrite(&studentArrayi,sizeof(struct student),1,fp); printf("nn");fclose(fp);fclose(fp2);printf("已成功修改该学生信息。n");/4、添加模块void addStudent() FILE *fp;char choice='y'int i=0;fp=fopen

16、("e:students.txt","ab");if(!fp)printf("创建文件失败，即将返回nn");return ;while(choice='y')printf("输入学生学号、 姓名、年龄、性别、出生年月，中间以空格隔开，以回车键结束n");printf(" (学号格式:001) (出生年月格式:1995-03) n");fflush(stdin);scanf("%s%s%d%s%s",&studentArrayi.number,&

17、;studentA,&studentArrayi.age,&studentArrayi.sex,&studentArrayi.birthday);fwrite(&studentArrayi,sizeof(struct student),1,fp); /将数据写入文件中i+;count+;printf("是否继续输入,继续输入输入y,其它值退出n");fflush(stdin);choice=getchar();choice=tolower(choice);fflush(stdin); /清空缓存输入流fclose(fp);

18、printf("输入任意键继续nn");getch();return ;/5、删除模块void delStudent() FILE *fp ,*fp2;int i;char choice;int flag1=1;int flag2=0; int found=0; /用来标记文件中是否含有此人 char studentNumber21;char studentName21;fp=fopen("e:students.txt","rb");if(count=0)printf("文件中没有信息,即将退出nn");/getc

19、h();return ;fp2=fopen("e:test.txt","wb");if(!fp2)printf("文件创建失败，即将退出n");return;printf("n");printf("1. 按照学号删除学生信息n");printf("2. 按照名字删除学生信息n");printf("3. 删除所有学生信息n");printf("n");printf(" 请选择菜单编号:");i=0;found=0;sc

20、anf("%d",&flag2);fflush(stdin);if(flag2=1)printf("输入要删除的学生的学号，按回车键结束n");scanf("%s",studentNumber);for(i=0;fread(&studentArrayi,sizeof(struct student),1,fp)!=0;i+) /将其他人信息转移到test.txt文件中if(strcmp(studentArrayi.number,studentNumber)fwrite(&studentArrayi,sizeof(

21、struct student),1,fp2);elsefound=1;fclose(fp);fclose(fp2);fflush(stdin);if(found=1)printf("是否确认删除学号为%s该学生信息，确认删除，输入y:n",studentNumber);elseprintf("没有此人信息,即将退出n");return ;choice=getchar();if(choice='y') /将文件结构指针重新定向count-;fp=fopen("e:students.txt","wb")

22、;fp2=fopen("e:test.txt","rb");for(i=0;fread(&studentArrayi,sizeof(struct student),1,fp2)!=0;i+)fwrite(&studentArrayi,sizeof(struct student),1,fp);fclose(fp);fclose(fp2);else if(flag2=0)printf("输入要删除的学生的名字，按回车键结束n");scanf("%s",studentName);for(i=0;fread

23、(&studentArrayi,sizeof(struct student),1,fp)!=0;i+) /将其他人信息转移到test.txt文件中if(strcmp(studentA,studentName)fwrite(&studentArrayi,sizeof(struct student),1,fp2);else found=1;fclose(fp);fclose(fp2);fflush(stdin);if(found=1)printf("是否确认删除名字为%s的该学生信息，确认删除，输入y:",studentName);elsep

24、rintf("没有此人信息,即将退出nn");return;choice=getchar();if(choice='y') /将文件结构指针重新定向count-;fp=fopen("e:students.txt","wb");fp2=fopen("e:test.txt","rb");for(i=0;fread(&studentArrayi,sizeof(struct student),1,fp2)!=0;i+)fwrite(&studentArrayi,sizeo

25、f(struct student),1,fp);fclose(fp);fclose(fp2); else if(flag2=3)char ch;printf("你确认删除所有学生记录吗?继续输入y,停止输入其他n");fflush(stdin);ch=getchar();if(ch='y')fp=fopen("e:students.txt","wb");count=0;printf("已删除所有学生记录n");return ;elseprintf("输入错误n");/6、显示模块

26、void printAllstudent() FILE *fp;int i; fp=fopen("e:students.txt","rb");if(count=0)printf("文件中还没有学生信息，即将退出nn");return;printf("有%d各学生的信息如下:n",count); printf("学生学号 学生姓名 年龄 性别 出生年月 n"); for(i=0;fread(&studentArrayi,sizeof(struct student),1,fp)!=0;i+)

27、 printf("%6s %9s %7d %5s %9sn",studentArrayi.number,studentA,studentArrayi.age,studentArrayi.sex,studentArrayi.birthday); return;/7、保存模块void save() int i; FILE *fp; fp=fopen("students.txt","w"); for(i=0;i<count;i+) fprintf(fp,"%s %s %d %s %s n",st

28、udentArrayi.number,studentA,studentArrayi.age,studentArrayi.sex,studentArrayi.birthday); fclose(fp); /8、退出模块void quit() printf("*n");printf("* *n");printf("* 谢谢使用! *n");printf("* 再见! *n");printf("* *n");printf("*n");/菜单模块int menuselect()int choice;doprintf(" 欢迎进入学生信息管理系统 n");printf(" n");printf(" *系统功能菜单*n");printf(" + +n");printf(" * 友情提示：查询前请先刷新系统 *n");printf(" + - - +n");printf(" * * *n");printf(&quo