程序代码：

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<conio.h> 
/*定义通讯录结构体*/ 
typedef struct record 
{
    char name[30];
    char phonenumber[11];
    char address[3][30]; //定义?维 0-省 1-市 2-街道
    char email[6];
    struct record *next;
} record;
void mainmenu();//声明通讯录主菜单
void alterstring(record *head);  
void browsemenu(record *head, const int *total);//浏览通讯录主菜单
record *newrecord(record *head, int *total);//添加联系?信息
record *deleterecord(record *head,int *total);//删除联系?信息
record *modifyrecord(record *head);//修改联系?信息
record *searchrecord(record *head, int onlyonerecord) ;//查找联系?信息
record *importrecords(record *head, int *total);//导?联系?信息
record *exportrecords(record *head);//导出联系?信息
/*定义主函数执?通讯录功能*/   
int main() 
{

 char mima[10]={0};

 int i=0;

 printf("请输?密码：\n");

 for(i=0;i<3;i++)

 {
  scanf("%s",mima);
  if(strcmp(mima,"123456")==0)
  {
   printf("登录成功，亲爱的?猪崽！\n");
   break;
     }
     else
{
      printf("密码错误，笨熊！请重新输?密码：\n");
  }

 }

 if(3==i)

 {
  printf("登录失败！?笨熊\n");
  exit(1);

 }

 system("pause");
    int total = 0, choice;
    record *head = NULL;
    printf("\n\t\t\t            欢迎使?通讯录系统!\n");
    printf("\n\t\t\t********************************************\n");
    do 

 {
        mainmenu();
        scanf("%d", &choice);
        system("cls");
        switch (choice) 
  {
            case 0:
                break;
            case 1:
             browsemenu(head, &total);
                break;
            case 2:
             head = newrecord(head, &total); 
                break;
            case 3:
                head = deleterecord(head,&total);
                break;
            case 4:
                head = modifyrecord(head);
                break;
            case 5:
                searchrecord(head,0);
                break;
            case 6:
                head = importrecords(head,&total);
                break;
            case 7:
                exportrecords(head)
break;
            default:
                printf("\n\n**对不起，输?错误，请输?0~7\n");
        };
    } 

 while (choice != 0);
    return 0;
}
/*通讯录界?*/ 
void mainmenu() 
{
    printf("\n");
    printf("\n\t\t\t****************1.浏览通讯录****************\n");
    printf("\n\t\t\t**************2.增加联系?信息**************\n");
    printf("\n\t\t\t**************3.删除联系?信息**************\n");
    printf("\n\t\t\t**************4.修改联系?信息**************\n");
    printf("\n\t\t\t**************5.查找联系?信息**************\n");
    printf("\n\t\t\t*************6.从?件中导?记录*************\n");
    printf("\n\t\t\t*************7.从记录导出到?件*************\n");
    printf("\n\t\t\t********************0.退出******************\n");
    printf("\n\t\t\t********************************************\n");
    printf("\n\t\t\t请输?0~7选择功能 :");
}
/*定义链表?地址，遇到回车键跳转下?个成员*/ 
void alterstring(record *head) {
    int m;
    record *p1 = head;
    while (p1 != NULL)
  {
        for (m = 0; m < 30; m++)
   {
            if (*((p1->name) + m) == '\n') 
   {
                *((p1->name) + m) = '\0';
            }
        }
        for (m = 0; m < 11; m++) 
  {
            if (*((p1->phonenumber) + m) == '\n') 
   {
                *((p1->phonenumber) + m) = '\0';
            }
        }
        for (m = 0; m < 30; m++)
   {
            if (*((p1->address[0]) + m) == '\n')
   {
                *((p1->address[0]) + m) = '\0';
            }
        }
        for (m = 0; m < 30; m++) 
  {
            if (*((p1->address[1]) + m) == '\n') 
   {
                *((p1->address[1]) + m) = '\0';
            }
        }
        for (m = 0; m < 30; m++) 
  {
            if (*((p1->address[2]) + m) == '\n')
{
                *((p1->address[2]) + m) = '\0';
            }
        }
        for (m = 0; m < 6; m++) 
  {
            if (*((p1->email) + m) == '\n') 
   {
                *((p1->email) + m) = '\0';
            }
        }
        p1 = p1->next;
    }
}
/*添加联系?信息*/ 
record *newrecord(record *head, int *total) //链表?地址，总数地址
{
    int i = *total;
    char inputchar;
    record *p = head, *input = (record *) malloc(sizeof(record));
    printf("\n**请输?联系?信息\n");
    /*如果已经有联系?信息，则输出现有的所有联系?信息 */
    /*如果已经有联系?信息，则输出现有的所有联系?信
if (*total) 

 {
        printf("**共有 %d 个联系?信息\n\n", *total);
    }
    do 

 {
        //输?联系?信息
        printf("请输?第%d个联系?的名字:", i + 1);
        fflush(stdin);//清理标准输?流，把多余未被保存的数据丢掉
        fgets(input->name, 31, stdin);//输?长度为31的字符串
        printf("请输?第%d个联系?的联系?式:", i + 1);
        fflush(stdin);
        fgets(input->phonenumber,31, stdin);
        printf("请输?第%d个联系?的家庭地址:\n", i + 1);
        printf("*请输?第%d个联系?所在省份:", i + 1);
        fflush(stdin);
        fgets(input->address[0], 31, stdin);
        printf("*请输?第%d个联系?所在城市:", i + 1);
        fflush(stdin);
        fgets(input->address[1], 31, stdin);
        printf("*请输?第%d个联系?所在街道:", i + 1);
        fflush(stdin);
        fgets(input->address[2], 31, stdin);
        printf("请输?第%d个联系?的电?邮件:", i + 1);
        fflush(stdin);
        fgets(input->email, 7, stdin);
        input->next = NULL; //插?时放?链表的最后
        //插?数据，分为?数据和??数据
        if (head == NULL) 
  {
            head = input;
            p = input;
        } 
  else 
  {
            while (p->next != NULL
{
                p = p->next;
            }
            p->next = input;
        }
        (*total)++;//计数-联系?的总?数
        printf("\n**是否继续？(Y/N):");
        scanf(" %c", &inputchar);
        /*如果?getchar只能输??写Y才可以继续*/
        if (inputchar=='Y' || inputchar=='y')
  {
            input = (record *) malloc(sizeof(record));//创建新的空间
            i++;
        } 
  else 
  {
            break;
        }
    } 

 while (1);
    //按回车键跳转
    alterstring(head);
    return head;
}
void browsemenu(record *head, const int *total) 
{
    int page = 1, firstindex = 0, i, pageamount = *total / 10 + 1;//定义联系?为?页
    record *p = head;
    do 

 {
        system("cls");
        /*输?页?的页数，不能过?或过?*/ 
        if (page > pageamount) 
  {
            printf("**对不起，页数的最?值为%d\n", pageamount);
        } 
  else if (page < 0) 
  {
            printf("**对不起，输?的数字必须为正数\n");
        } 
  else 
  {
            //处理分页，?个联系??页
            firstindex = 10 * (page - 1);
            printf("NO.\t姓名\t联系电话\t省\t市\t街道\t电?邮件\t\n");
            //处理前置数据
            p = head;
            for (i = 0; i < firstindex; ++i) 
   {
                p = p->next;
            }
            i = 0;
            //输出数据
            while (p!=NULL && i<10)
{ 
                i++;
                printf("NO.%d\t%s\t%s\t\t%s\t%s\t%s\t%s\t\n", i+firstindex,p->name, p->phonenumber, p->address[0], p->address[1],
                       p->address[2],
                       p->email);
                p = p->next;
            }
            printf("** Page %d (共 %d 页)\n ", page, pageamount);
        }
        printf("** 请输?跳转页?(按0返回通讯录主菜单):");
        scanf("%d", &page);
    } 

 while (page);
}
/*删除联系?信息*/ 
record *deleterecord(record *head,int *total) 
{
    record *p1 = head, *p2,*searchrestlt;
    searchrestlt = searchrecord(head, 1);
    while (p1 != NULL && p1 != searchrestlt) 

 {
        p2 = p1;         //p2的上?个节点
        p1 = p1->next;   //p1的下?个节点
    }
    if (p1 == head) 

 {
        head = p1->next;
        free(p1);
        (*total)--; 
        printf("\n**删除成功!\n");
    } 

 else if (p1 != NULL)
{
        p2->next = p1->next;
        free(p1);
        (*total)--;
        printf("\n* *删除成功!\n");
    } 

 else 

 {
        printf("\n**对不起，没有找到该联系?!\n");
    }
    return head;
}
//输出联系?信息
void printonerecord(record *p) 
{
    printf("姓名:%s\t联系电话:%s\t省:%s\t市:%s\t街道::%s\t电?邮件:%s\t\n", p->name, p->phonenumber,
           p->address[0], p->address[1], p->address[2], p->email);
}
/*修改联系?信息*/ 
record *modifyrecord(record *head)
{
    record *p1 = head, *p2,*searchrestlt,*input = (record *) malloc(sizeof(record));
    //返回需要修改的数组地址
    searchrestlt = searchrecord(head, 1);
    if (!searchrestlt)

 {
        return head;
    }
    //输?联系?信息
    printf("\n请输?修改的联系?姓名:");
    fflush(stdin);
fgets(input->name, 30 + 1, stdin);
    printf("请输?修改的联系?的联系电话:");
    fflush(stdin);
    fgets(input->phonenumber,30 + 1, stdin);
    printf("请输?修改的联系?的地址:\n");
    printf("请输?修改的联系?的省份:");
    fflush(stdin);
    fgets(input->address[0], 30 + 1, stdin);
    printf("请输?修改的联系?的城市:");
    fflush(stdin);
    fgets(input->address[1], 30 + 1, stdin);
    printf("请输?修改的联系?的街道:");
    fflush(stdin);
    fgets(input->address[2], 30 + 1, stdin);
    printf("请输?修改的联系?的电?邮件:");
    fflush(stdin);
    fgets(input->email, 7, stdin);
    //插?时放于链表的最后
    input->next = NULL;
    while (p1 != NULL && p1 != searchrestlt)
{
        p2 = p1;         //p2上?个节点
        p1 = p1->next;   //p1下?个节点
    }
    if (p1 == head) 

 {
        head = input;
        input->next = p1->next;
        free(p1);  
        printf("\n**修改成功!\n");
    } 

 else if (p1 != NULL) 

 else if (p1 != NULL) 

 {
        p2->next = input;
        input->next = p1->next
{
        p2->next = input;
        input->next = p1->next;
        free(p1);
        printf("\n**修改成功!\n");
    } 

 else 

 {
        printf("\n-- Do not find this id!\n");
    }
    alterstring(head);
    return head;
}
/*查找联系?信息*/ 
record *searchrecord(record *head, int onlyonerecord) 
{
    int amount = 0, i = 0, choice = 0; //i,p1循环变量
    char input[30];
    record *p1 = head, *results[100] = {NULL}; //result是record类型的指针数组
    printf("\n查找联系?:");
    setbuf(stdin, NULL);//关闭输?缓冲区
    fgets(input, 30 + 1, stdin);
    for (i = 0; i < 30; ++i) 

 {
        if (*((input) + i) == '\n') 
  {
            *((input) + i) = '\0';
        }
    }
    //遍历搜索
    while (p1 != NULL) 

 {
        if (strstr(p1->name, input) ||   //strstr()判断是否为?串
            strstr(p1->phonenumber, input) ||
            strstr(p1->address[0], input)
strstr(p1->address[1], input) ||
            strstr(p1->address[2], input) ||
            strstr(p1->email, input)) {
            results[amount] = p1;
            amount++;
        }
        p1 = p1->next;
    }
    //若有同名同信息，根据编号选择联系?
    if (amount > 1) 

 {
        printf("\n查找结果:\n");
        for (i = 0; i < amount; i++) 
  {
            printf("NO.%d\t", i + 1);
            printonerecord(results[i]);
        }
        if (!onlyonerecord) 
  {
            return NULL; //如果不需要去重，则返回NULL
}
        printf("\n**请输?你要删除的联系?编号: ");
        scanf("%d", &choice);
        //若输?联系?编号不正确，默认删除第?位联系?
        if (choice-1>amount || choice<0) 
  {
            printf("\n**输?错误(默认删除第?位联系?)");
            return results[0];
}
        return results[choice - 1];
    } 

 else if (!amount) 

 {
        printf("\n**对不起，没有找到该联系?!");
        return NULL;
    } 

 else 

 {
        printf("\n** 查找结果:\n");
        printonerecord(results[0]);
        return results[0];
    }
}