实现一个通讯录；通讯录可以用来存储1000个人的信息，每个人的信息包括：姓名、性别、年龄、电话、住址功能如下：1. 添加联系人信息2. 删除指定联系人信息3. 查找指定联系人信息4. 修改指定联系人信息5. 显示所有联系人信息
6. 清空所有联系人
模块化设计：
头文件 结构体和相应函数的定义，声明
#include <stdio.h> #include <string.h> #include <stdlib.h> #include <memory.h> #define MAX 1000 #define NAME_LENGTH 20 #define SEX_LENGTH 5 #define AGE_LENGTH 3 #define TELE_LENGTH 20 #define ADDR_LENGTH 30 /*结构体 用于储存通讯录人员信息*/struct ContactsUser{char name[NAME_LENGTH];char sex[SEX_LENGTH];/*VS编译器下scanf_s对于长度有安全保护 因此采用字符数组保存年龄*/char age[AGE_LENGTH];char tele[TELE_LENGTH];char addr[ADDR_LENGTH];};/*结构体 将上一个结构体装起来 同时创建变量记录人数*/struct Contacts{struct ContactsUser person[MAX];int user_count;};typedef struct Contacts *pContacts;int add_contacts(pContacts pcon);//添加函数int dele_contacts(pContacts pcon);//删除函数int clear_contacts(pContacts pcon);//清空函数int find_contacts(pContacts pcon);//查找函数int modify_contacts(pContacts pcon);//修改函数void show_contacts(pContacts pcon);//显示函数void menu();//主菜单</span>#include "contacts.h" /*各个功能函数*//*菜单*/void menu(){printf("Contacts\n");printf("\n");printf("1. Add the users_info \n");printf("2. Delete the users_info \n");printf("3. Clean all the users_info\n");printf("4. Find the users_info \n");printf("5. Modify the users_info\n");printf("6. Show all the users_info\n");printf("7. exit\n");printf("\n");}/*查询实体函数 用于将输入的用户特征和储存进行比较（strcmp）方便其他功能函数的调用*/int find_entry(pContacts pcon){int i = 0;char name[NAME_LENGTH];printf("please input name:");scanf_s("%s", name,NAME_LENGTH);for (i = 0; i < pcon->user_count; i++){if (strcmp(pcon->person[i].name, name) == 0) //输入和存储进行比较{return i;}}return -1;}/*增添函数*/int add_contacts(pContacts pcon){if (pcon->user_count == MAX){printf("Telephone book is full！\n");return -1;}else{printf("Please input name:");/*scanf_s安全函数 应该添加控制长度的参数*/scanf_s("%s", pcon->person[pcon->user_count].name, NAME_LENGTH);/*数组从下标为0到下标为user_count-1 ，，则在user_count处操作*/printf("Please input sex:");scanf_s("%s", pcon->person[pcon->user_count].sex, SEX_LENGTH);printf("Please input age:");scanf_s("%s", pcon->person[pcon->user_count].age, AGE_LENGTH);printf("Please input tele:");scanf_s("%s", pcon->person[pcon->user_count].tele,TELE_LENGTH);printf("Please input addr:");scanf_s("%s", pcon->person[pcon->user_count].addr, ADDR_LENGTH);pcon->user_count++;//添加结束 人员数目增加1return 1;}}/*删除函数*/int dele_contacts(pContacts pcon){int i = 0;int ret = find_entry(pcon);//定义ret 接收find_entry的返回位置if (ret != -1){for (i = ret; i < pcon->user_count – 1; i++){pcon->person[i] = pcon->person[i + 1];}pcon->user_count–;return 1;}else{printf("not exist!\n");return -1;}}/*清空函数*/int clear_contacts(pContacts pcon){ memset(pcon->person,0,MAX);/*memset函数 在一段内存中填充给定的值 是对较大结构体或数组清零的最快方法*/pcon->user_count = 0; //count 赋值0 进行清零return 1;}/*查找函数*/int find_contacts(pContacts pcon){int ret = find_entry(pcon);//定义ret 接收find_entry的返回位置if (ret != -1){printf("name:%-5s", pcon->person[ret].name, NAME_LENGTH);printf("sex:%-5s", pcon->person[ret].sex, SEX_LENGTH);printf("age:%-5s", pcon->person[ret].age, AGE_LENGTH);printf("tele:%-5s", pcon->person[ret].tele, TELE_LENGTH);printf("addr:%-5s", pcon->person[ret].addr, ADDR_LENGTH);return 1;}else{printf("not exist!\n");return -1;}}/*修改函数*/int modify_contacts(pContacts pcon){int ret = find_entry(pcon);//定义ret 接收find_entry的返回位置if (ret != -1){printf("Please input name:");scanf_s("%s", pcon->person[ret].name, NAME_LENGTH);printf("Please input sex:");scanf_s("%s", pcon->person[ret].sex, SEX_LENGTH);printf("Please input age:");scanf_s("%s", pcon->person[ret].age, AGE_LENGTH);printf("Please input tele:");scanf_s("%s", pcon->person[ret].tele, TELE_LENGTH);printf("Please input addr:");scanf_s("%s", pcon->person[ret].addr, ADDR_LENGTH);return 1;}else{printf("not exist!\n");return -1;}}/*显示函数*/void show_contacts(pContacts pcon){int i = 0;printf("\tname\tsex\t\tage\t\ttele\t\t\taddr\n");for (i = 0; i < pcon->user_count; i++){printf("%10s\t", pcon->person[i].name);printf("%5s\t", pcon->person[i].sex);printf("%10s\t", pcon->person[i].age);printf("%15s\t", pcon->person[i].tele);printf("%20s\t", pcon->person[i].addr);}printf("\n");}</span>#include "contacts.h" /*主函数*/int main(){int input = 1; //定义一个输入 初始化struct Contacts user;user.user_count = 0;//为user_count进行初始化menu(); while (input){printf("\n enter you choice(0-7):\n");scanf_s("%d", &input);switch (input) //switch-case 使用不同的功能函数{case 1:add_contacts(&user);break;case 2:dele_contacts(&user);break;case 3:clear_contacts(&user);break;case 4:find_contacts(&user);break;case 5:modify_contacts(&user);break;case 6:show_contacts(&user);break;case 7:printf("Thanks for use!\n");break;default:printf("input error!\n");break;}}return 0;}
运行结果：要愈合不能，要忘却不能，要再次拥抱，却鼓不起足够的勇气，
