程序代码：

#define N 15
#include <stdio.h>
#include <string.h>
struct PERSON 
{
    int type;    //联系人类型
    char name[12];    //联系人姓名
    char tel[12];    //联系人电话
    char email[30];   //联系人Email
};
struct PERSON person[N];
//int num = 0;  //全局变量，当前联系人数
int menu()
{
    int n;

    printf("\n\t************ MENU ************\n\n");
    printf("\t\t 1. 查看所有联系人\n\n");
    printf("\t\t 2. 添加联系人\n\n");
    printf("\t\t 3. 修改联系人\n\n");
    printf("\t\t 4. 删除联系人\n\n");
    printf("\t\t 0. 退出\n");
    printf("\n\t******************************\n\n");

    printf("\tselect: ");

    scanf("%d", &n);

    if (n>4 || n<1)
    {
    printf("\nerror, select again\n");    //输入数据不合法，重新输入
    }
    return n;
}


//显示所有联系人
void browse( struct PERSON person[],int number )
{
    int m,i,j = 0;
    printf("\t办公类--1 个人类--2 商务类--3\n");
    printf("\t请选择联系人类型: "); 
    scanf("%d",&m);
    for(i = 0;i <= number;i++)
    {
        if(person[i].type == m)  
        {
            printf("\n\t\t姓名         电话\n");
            printf("\t\t%-12s %-12s\n",person[i].name,person[i].tel); 
            j++;
        }
    }
    if(j == 0) printf ("\n\t该目录下为空，请稍后再试!\n\n");
    
    return ;
}

//排序
void sort(struct PERSON *person[],int number)
{
    struct PERSON *temp;
    int j,k;
    for( j = 0;j < number-1;j++)
    for( k = j+1;k < number;k++)
    {
        if(strcmp(person[j]->name,person[k]->name)>0)
        {
            temp = person[j];
            person[j] = person[k];
            person[k] = temp;
        }
    }
    return ;
}


//添加联系人
void insert(struct PERSON *person,int number)
{
    if(number == N) printf("\t记录已满，请先删除无用信息!\n"); 
    else 
    {
        printf("\n\t请输入姓名: ");
        scanf("%s",&person[number].name);
        printf("\t请输入电话号码: ");
        scanf("%s",&person[number].tel);
        printf("\t请输入Email地址: ");
        scanf("%s",&person[number].email);
        printf("\t请输入联系人类型(办公类--1 个人类--2 商务类--3): ");
        scanf("%d",&person[number].type);

        printf("\n\t添加联系人成功!\n");
    }
    sort(&person,number);
    return ;
}

//修改联系人
void modify(struct PERSON *person,int number)
{
    int i = 0;
    char nname[12];
    printf("\t请输入要修改联系人的姓名: ");
    scanf("%s",&nname);
    while (i < number && strcmp(person[i].name,nname))  i++;

    if(!strcmp(person[i].name,nname))  //已查找到要修改的信息
    { 
        printf("\t您要修改的信息为:\n\n");
        printf("\t\t姓名: ");
        printf("\t%-12s\n",person[i].name);
        printf("\t\t电话: ");
        printf("\t%-12s\n",person[i].tel);
        printf("\t\t邮箱: ");
        printf("\t%-12s\n",person[i].email);
        printf("\t\t类型:  ");
        if(person[i].type == 1) printf("办公类\n");
            else if(person[i].type == 2) printf("个人类\n");
                 else printf("商务类\n");
        printf("\n\t请输入修改后的姓名:  ");
        scanf("\n%s",&person[i].name);
        printf("\t请输入修改后的电话:  ");
        scanf("%s",&person[i].tel);
        printf("\t请输入修改后的Email:  ");
        scanf("%s",&person[i].email);
        printf("\t请输入修改后的联系人类型(办公类--1 个人类--2 商务类--3):  ");
        scanf("%d",&person[i].type);
        sort(&person,number);
        printf("\n\t联系人修改成功!\n");
    }
    else printf("\n\t未查找到相关信息，请稍后再试!\n");
}



//删除联系人
void del( struct PERSON *person,int number )
{
    int control,i = 0;
    char nname[12];
    printf("\t请输入要删除联系人的姓名: ");
    scanf("%s",&nname);
    while (i<number&&strcmp(person[i].name,nname))  i++;
    if(!strcmp(person[i].name,nname))  //已查找到要修改的信息
    { 
        printf("\t您要删除的信息为:\n\n");
        printf("\t\t姓名: ");
        printf("\t%-12s\n",person[i].name);
        printf("\t\t电话: ");
        printf("\t%-12s\n",person[i].tel);
        printf("\t\t邮箱: ");
        printf("\t%-12s\n",person[i].email);
        printf("\t\t类型:  ");
        if(person[i].type == 1) printf("办公类\n");
            else if(person[i].type == 2) printf("个人类\n");
                 else printf("商务类\n");
        printf("\n\t是否确认删除?(1--是，0--否): ");
        scanf("%d",&control);
        switch(control)
        {
            case 1:for(;i < number-1;i++) person[i] = person[i + 1];  printf("\n\t删除成功!\n");break;
            case 0:printf("\n\t联系人未删除!\n"); break;
            default:printf("\n\t选择有误,请稍后再试!\n"); break;
        }
    }
    else printf("\n\t抱歉!未找到相关信息! 请稍候再试!\n");
    return ;
}

int main(int argc, char* argv[])
{
    
    printf("\t****************************************\n");
    printf("\t********欢迎使用通讯录管理系统!*********\n");
    printf("\t****************************************\n");
    while(1)
    {
        int num = 0;  //全局变量，当前联系人数
        int n = menu();
        if (n == 0) {printf("\t\n谢谢使用!再见!\n");break;}
        else
        {    
            switch(n)
            { 
            case 1:browse(person,num);break;
            case 2:insert(&person,num); num++;break;
            case 3:modify(&person,num);break;
            case 4:del(&person,num); num--;break;
            default:break;  
            }
        }
    }
return 0;
}