C语言手机通讯录系统

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <string.h>
#define N 15
typedef struct 
{
 char name[10];
 char haoma[15];
     int  xuhao;
     char dizhi[20];
}ren;
//菜单
void menu()
{
  system("cls");
  printf("   欢迎使用手机通讯录\n");
    printf("=======================\n");
    printf("  1.号码录入\n");
    printf("  2.查询\n");
    printf("  3.修改\n");
    printf("  4.删除\n");
    printf("  0.退出\n");   
printf("=======================\n");
 printf("                               计科五班李云\n");

printf("请选择相应的功能:");

}//号码录入
void input()

{
FILE *fp;
ren ry;
if((fp=fopen("ren.dat","ab"))==NULL) {printf("can't open file!\n");exit(0);}
 printf("\n录入格式 姓名 号码　地址。当输入姓名为#结束录入\n");
while(1)
{  scanf("%s",ry.name);
  if(strcmp(ry.name,"#")==0) break;
  scanf("%s",ry.haoma);
  scanf("%s",ry.dizhi);
   fwrite(&ry,sizeof(ren),1,fp); //将成绩信息写入文件
}
fclose(fp);
}//查询
void search()
{
ren ry;
FILE *fp;
char name[10];
system("cls");
printf("\n输入要查人员的姓名: ");scanf("%s",name);

if((fp=fopen("ren.dat","rb"))==NULL) {printf("can't open file!\n");exit(0);}
while(!feof(fp))
{fread(&ry,sizeof(ren),1,fp);
 if(strcmp(ry.name,name)==0)
 {  printf("    人员的信息如下:\n");
 printf("\n%10s %15s %20s \n","姓名","号码","地址");
     printf("%10s %15s %20s \n",ry.name,ry.haoma,ry.dizhi);
 break;