#include #include #include #include #define bool int#define true 1#define false 0FILE *fp;struct tongxunlu/*定义通讯录结构体变量*/{char xingming[20];/*定义输入名字的数组*/char dianhua[20]; /*定义输入电话号码的数组*/char dizhi[40]; /*定义输入地址的数组*/char shouji[11];//手机号码char youxiang[20];/*定义输入邮箱的数组*/char beizhu[40];/*定义输入备注的数组*/char xuehao[10];/*定义输入学号的数组*/char yunying[20];} txl[100]; //默认 100 个数据int n=0;//记录数据联系人数量int x,y,z,*p;char ch;bool judge=true;typedef struct{char user[20];char code[20];}USER;USER pe;void zhuce();void denglu();void panduan(int i);void zengjia();void writefile();void redfile();void write();void caozuo();void chazhao();void chazhao_xingming();void chazhao_dianhua();void xianshi();void xiugai();void xiugai_xingming();void xiugai_dianhua();void shanchu();void shanchu_quanbu();void shanchu_dange();void main(){printf("****************欢迎使用联系人管理系统****************\n");printf("\t\t1.用户登陆 2.用户注册 3.退出");ch=getch();if(ch=='1'||ch=='2'){switch(ch){case '1' : system("cls");denglu();break;case '2' : system("cls");zhuce();break;default : printf("error!");}}if(ch=='1'||ch=='2')writefile();else printf("\n\t\tBye^_^");exit(0);}void caozuo(){printf("\n\t\t1.添加联系人 2.查找 3.修改 4.删除 5.保存退出 6.不保存退出 7.保存并注销 8.注销不保存");ch=getch();switch(ch){case '1' : system("cls");zengjia();break;case '2' : system("cls");chazhao();break;case '3' : system("cls");xiugai();break;case '4' : system("cls");shanchu();break;case '5' : system("cls");writefile();break;case '6' : printf("\n\t\tBye^_^");exit(0);case '7' : printf("\n\t\t 正在保存,请稍后......\n\t\t 注销成功");writefile();break;case '8' : fclose(fp);printf("\n\t\t注销成功");return main();break;default : printf("\n\t\terror!");return caozuo();}}void write()/*用户信息写入*/{if((fp=fopen(pe.user,...
