小编这次要给大家分享的是C语言如何实现简单通讯录，文章内容丰富，感兴趣的小伙伴可以来了解一下，希望大家阅读完这篇文章之后能够有所收获。

本文实例为大家分享了C语言实现简易通讯录的具体代码，供大家参考，具体内容如下

一、概述

通讯录的实现其中包括了指针、结构体、动态内存管理、文件的读写操作等知识点，是对这些知识点应用巩固的非常好的例子；

通讯录功能如下：

二、代码如下

contact.h

#ifndef CONTACT_H#define CONTACT_H#define NAME_MAX 20#define SEX_MAX 10#define TEL_MAX 12#define ADDR_MAX 20#define MEMBER_MAX 1typedef struct info{ char name[NAME_MAX]; char sex[SEX_MAX]; int age; char tele[TEL_MAX]; char addr[ADDR_MAX];}info;typedef struct contact{ info *data; int size; int capacity;}contact, *pcontact;//初始化通讯录void InitContact(pcontact list);//添加联系人void AddContact(pcontact list);//删除联系人void DellContact(pcontact list);//查找联系人void FindContact(pcontact list);//修改联系人void ModContact(pcontact list);//显示所有联系人void ShowContact(pcontact list);//联系人排序（选择法）void SortContact(pcontact list);//检查容量int CheckSize(pcontact list);//查找联系人在数组data第几个位置int FindContactAddr(pcontact list);//从文件中加载联系人到内存void LoadContact(pcontact list);//将联系人从内从中保存到文件void SaveContact(pcontact list);#endif

contact.c

#include <stdio.h>#include <stdlib.h>#include <string.h>#include "contact.h"//初始化通讯录void InitContact(pcontact list){ list->data = (info *)malloc(sizeof(info)* MEMBER_MAX); list->size = 0; list->capacity = MEMBER_MAX; //每次初始化是加载一遍文件，防止最新录入的在保存在文件时覆盖上次 //打开程序时保存的信息 LoadContact(list);}//添加联系人void AddContact(pcontact list){ info tmp_member; if (CheckCapacity(list) == 0) { printf("成员已满，添加失败！"); return; } printf("请输入姓名:"); scanf("%s", tmp_member.name); printf("请输入性别:"); scanf("%s", tmp_member.sex); printf("请输入年龄:"); scanf("%d", &tmp_member.age); printf("请输入电话:"); scanf("%s", tmp_member.tele); printf("请输入地址:"); scanf("%s", tmp_member.addr); list->data[list->size] = tmp_member; printf("添加成功！\n"); list->size++;}//删除联系人void DellContact(pcontact list){ char tmp_name[NAME_MAX] = { 0 }; int ret = 0; printf("请输入姓名:"); scanf("%s", tmp_name); ret = FindContactAddr(list, tmp_name); if (ret == -1) { printf("无此联系人！\n"); return; } for (ret; ret < list->size - 1; ret++) { list->data[ret] = list->data[ret + 1]; } printf("删除成功！\n"); list->size--;}//查找联系人void FindContact(pcontact list){ char tmp_name[NAME_MAX] = { 0 }; printf("请输入姓名:"); scanf("%s", tmp_name); for (int i = 0; i < list->size; i++) { if (strcmp(tmp_name, list->data[i].name) == 0) { printf("===============================\n"); printf("姓名:%s\n", list->data[i].name); printf("性别:%s\n", list->data[i].sex); printf("年龄:%d\n", list->data[i].age); printf("电话:%s\n", list->data[i].tele); printf("地址:%s\n", list->data[i].addr); printf("===============================\n"); return; } } printf("无此联系人！\n");}//查找联系人在数组data第几个位置int FindContactAddr(pcontact list, char *tmp_name){ for (int i = 0; i < list->size; i++) { if (strcmp(tmp_name, list->data[i].name) == 0) return i; } return -1;}//修改联系人void ModContact(pcontact list){ info tmp_member; int ret = 0; printf("请输入姓名:"); scanf("%s", tmp_member.name); ret = FindContactAddr(list, tmp_member.name); if (ret == -1) { printf("无此联系人！\n"); return; } printf("请输入性别:"); scanf("%s", tmp_member.sex); printf("请输入年龄:"); scanf("%s", &tmp_member.age); printf("请输入电话:"); scanf("%s", tmp_member.tele); printf("请输入地址:"); scanf("%s", tmp_member.addr); list->data[ret] = tmp_member; printf("修改成功!\n");}//联系人排序（选择法）void SortContact(pcontact list){ info tmp_member; for (int i = 0; i < list->size - 2; i++) { for (int j = 1; j < list->size - 1; j++) { if (strcmp(list->data[i].name, list->data[j].name) > 0) { tmp_member = list->data[i]; list->data[i] = list->data[j]; list->data[j] = tmp_member; } } }}//检查上次动态开辟的空间是否够用，不够时继续开辟int CheckCapacity(pcontact list){ if (list->size == list->capacity) { info *tmp = (info *)malloc(sizeof(info)* (list->capacity + 10)); if (tmp == NULL) return 0; memcpy(tmp, list->data, sizeof(info) * list->size); free(list->data); list->data = tmp; list->capacity += 10; } return 1;}//显示所有联系人void ShowContact(pcontact list){ for (int i = 0; i < list->size; i++) { printf("============第%d位==============\n", i + 1); printf("姓名:%s\n", list->data[i].name); printf("性别:%s\n", list->data[i].sex); printf("年龄:%d\n", list->data[i].age); printf("电话:%s\n", list->data[i].tele); printf("地址:%s\n", list->data[i].addr); printf("===============================\n"); }}//从文件中加载联系人到内存void LoadContact(pcontact list){ info tmp_member; FILE *pf = NULL; pf = fopen("./contatc.dat", "rb"); if (pf == NULL) perror("fopen error"); //按照内存块读取，一次读1块，1块大小是sizeof(info) while (fread(&tmp_member, sizeof(info), 1, pf)) { if (CheckCapacity(list)) { list->data[list->size] = tmp_member; list->size++; } } if (pf != NULL) { fclose(pf); pf = NULL; printf("加载成功！\n"); }}//将联系人从内从中保存到文件void SaveContact(pcontact list){ FILE *pf = NULL; pf = fopen("./contatc.dat", "wb"); if (pf == NULL) perror("fopen error"); for (int i = 0; i < list->size; i++) { //按照内存块写入，一次写1块，1块大小是sizeof(info) fwrite(list->data + i, sizeof(info), 1, pf); } if (pf != NULL) { fclose(pf); pf = NULL; printf("保存成功！\n"); }}

test.c

#define _CRT_SECURE_NO_WARNINGS#include <stdlib.h>#include "contact.h"enum opt{ Exit, Add, Dell, Find, Mod, Show, Load, Save, Sort,};void menu(void){ printf("/*========================通讯录======================*/\n"); printf("/*= 0.退出通讯录 1.添加联系人 =*/\n"); printf("/*= 2.删除联系人 3.查找联系人 =*/\n"); printf("/*= 4.修改联系人 5.显示所有联系人 =*/\n"); printf("/*= 6.加载联系人 7.保存联系人 =*/\n"); printf("/*= 8.联系人排序 =*/\n"); printf("/*====================================================*/\n");}void TestContact(void){ contact pc; InitContact(&pc); int opt = 0; do { menu(); printf("请选择:>"); scanf("%d", &opt); switch (opt) { case Exit: printf("退出系统...\n"); break; case Add: AddContact(&pc); break; case Dell: DellContact(&pc); break; case Find: FindContact(&pc); break; case Mod: ModContact(&pc); break; case Show: ShowContact(&pc); break; case Load: LoadContact(&pc); break; case Save: SaveContact(&pc); break; case Sort: SortContact(&pc); break; default: printf("输入选项有误，重新输入!\n"); break; } } while (opt);}int main(void){ TestContact(); printf("\n"); system("pause"); return 0;}

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