C语言实现简单通讯录功能 C语言实现简单通讯录功能

本文实例为大家分享了C语言实现简单通讯录功能的具体代码，供大家参考，具体内容如下
1.存放联系人信息
2.信息：名字+年龄+性别+电话+住址
3.增加联系人
4.删除联系人
5.查找联系人
6.修改联系人
7.排序
test.c源文件代码如下：

#define _CRT_SECURE_NO_WARNINGS 1#include "contact.h"void menu(){ printf("#####################################\n"); printf("#####1. add2. del#####\n"); printf("#####3. search4. modify#####\n"); printf("#####5. show6. sort#####\n"); printf("#####0. exit#####\n"); printf("#####################################\n"); }//创建一个枚举类型，分别对应菜单选项enum Option{ EXIT, ADD, DEL, SEARCH, MODIFY, SHOW, SORT,}; int main(){ int input = 0; //创建一个通讯录 struct Contact con; //初始化通讯录 InitContact(&con); //最多可以放3个联系人信息 //空间不够再增容 do {menu(); //进入循环，先打印菜单printf("请选择:>"); scanf("%d", &input); //用户选择操作switch (input){case ADD:AddContact(&con); break; case DEL:DelContact(&con); break; case SEARCH:SearchContact(&con); break; case MODIFY:ModifyContact(&con); break; case SHOW:ShowContact(&con); break; case SORT:SortContact(&con); break; case EXIT:SaveContact(&con); //销毁通讯录DestroyContact(&con); printf("退出\n"); break; default:printf("选择错误\n"); break; } } while (input); return 0; }

contact.c源文件代码如下：

#define _CRT_SECURE_NO_WARNINGS 1#include "contact.h"//检测通讯录容量void CheckCapacity(struct Contact* pc){ //断言 assert(pc); if (pc->sz == pc->capacity)//如果有效联系人等于最大容纳量 {//增加容量struct PeoInfo* ptr = realloc(pc->data, (pc->capacity + 2) * sizeof(struct PeoInfo)); if (ptr != NULL)//如果不为空，表示增容成功{pc->data = https://www.it610.com/article/ptr; pc->capacity += 2; printf("增容成功\n"); }else{perror("AddContact::realloc"); return; } }}//加载有效联系人信息void LoadContact(struct Contact* pc){ assert(pc); struct PeoInfo tmp = { 0 }; //临时空间 FILE* pfRead = fopen("contact.txt", "rb"); //打开文件，读取数据 if (NULL == pfRead) {perror("open file for reading"); return; } //加载数据 //每次读取一个联系人信息，直到frea返回值小于1，表示读取完毕，循环结束 while (fread(&tmp, sizeof(struct PeoInfo), 1, pfRead)) {CheckCapacity(pc); pc->data[pc->sz] = tmp; pc->sz++; } //关闭文件 fclose(pfRead); pfRead = NULL; //置空，防止变成野指针}//初始化通讯录void InitContact(struct Contact* pc){ assert(pc); pc->sz = 0; pc->capacity = DEFAULT; pc->data = https://www.it610.com/article/(struct PeoInfo*)malloc(DEFAULT * sizeof(struct PeoInfo)); //动态申请空间 if (pc->data =https://www.it610.com/article/= NULL) {perror("InitContact::malloc"); return; } LoadContact(pc); //加载通讯录的信息}//增加联系人void AddContact(struct Contact* pc){ assert(pc); CheckCapacity(pc); //检查容量是否为满，是则进行增容 //输入增加指定联系人的信息 printf("请输入名字:>"); scanf("%s", pc->data[pc->sz].name); printf("请输入年龄:>"); scanf("%d", &(pc->data[pc->sz].age)); printf("请输入性别:>"); scanf("%s", pc->data[pc->sz].sex); printf("请输入电话:>"); scanf("%s", pc->data[pc->sz].tele); printf("请输入地址:>"); scanf("%s", pc->data[pc->sz].addr); printf("添加成功\n"); pc->sz++; //有效联系人加1}//销毁通讯录void DestroyContact(struct Contact* pc){ assert(pc); free(pc->data); //释放申请的动态内存空间 pc->data = https://www.it610.com/article/NULL; //置为空指针 pc->capacity = 0; //容量置0 pc->sz = 0; //有效联系人置0}//显示通讯录信息void ShowContact(const struct Contact* pc){ assert(pc); int i = 0; printf("%20s\t%5s\t%10s\t%12s\t%50s\n\n", "name", "age", "sex", "tele", "addr"); for (i = 0; i < pc->sz; i++) {//打印每一个数据printf("%20s\t%5d\t%10s\t%12s\t%50s\n", pc->data[i].name, pc->data[i].age, pc->data[i].sex, pc->data[i].tele, pc->data[i].addr); }}//查找指定联系人int FindContactByName(const struct Contact* pc, const char* name){ assert(pc && name); int i = 0; for (i = 0; i < pc->sz; i++) {if (strcmp(pc->data[i].name, name) == 0){return i; } } //找不到 return -1; }//删除指定联系人void DelContact(struct Contact* pc){ assert(pc); if (pc->sz == 0) {printf("通讯录为空，无法删除\n"); return; } char name[NAME_MAX] = { 0 }; printf("请输入要删除联系人的名字:>"); scanf("%s", name); //查找到删除的人 int pos = FindContactByName(pc, name); if (pos == -1)printf("指定联系人不存在\n"); else {//删除int i = 0; for (i = pos; i < pc->sz-1; i++){pc->data[i] = pc->data[i + 1]; }pc->sz--; printf("成功删除\n"); } }//查找指定联系人void SearchContact(const struct Contact* pc){ assert(pc); char name[NAME_MAX] = { 0 }; if (pc->sz == 0) {printf("通讯录为空，无法查找\n"); return; } printf("请输入要查找的联系人名字:>"); scanf("%s", name); int pos = FindContactByName(pc, name); if (-1 == pos)printf("查无此人\n"); else {printf("%15s\t%5s\t%8s\t%15s\t%30s\n\n", "name", "age", "sex", "tele", "addr"); printf("%15s\t%5d\t%8s\t%15s\t%30s\n",pc->data[pos].name,pc->data[pos].age,pc->data[pos].sex,pc->data[pos].tele,pc->data[pos].addr); }}//修改指定联系人void ModifyContact(struct Contact* pc){ assert(pc); char name[NAME_MAX] = { 0 }; if (pc->sz == 0) {printf("通讯录为空，无法修改\n"); return; } printf("请输入要修改的联系人名字:>"); scanf("%s", name); int pos = FindContactByName(pc, name); if (-1 == pos)printf("要修改的人不存在\n"); else {printf("请输入新的名字:>"); scanf("%s", pc->data[pos].name); printf("请输入新的年龄:>"); scanf("%d", &(pc->data[pos].age)); printf("请输入新的性别:>"); scanf("%s", pc->data[pos].sex); printf("请输入新的电话:>"); scanf("%s", pc->data[pos].tele); printf("请输入新的地址:>"); scanf("%s", pc->data[pos].addr); }}//按照名字排序->升序int cmp_by_name(const void* e1, const void* e2){ return strcmp((((struct PeoInfo*)e1)->name), (((struct PeoInfo*)e2)->name)); }//按照年龄排序->升序int cmp_by_age(const void* e1, const void* e2){ return ((struct PeoInfo*)e1)->age - ((struct PeoInfo*)e2)->age; }//排序通讯录void SortContact(struct Contact* pc){ assert(pc); int input = 0; if (pc->sz == 0) {printf("通讯录为空，无法排序\n"); return; } printf("按名字排序请输入1，年龄排序请输入2:>"); scanf("%d", &input); if (1 == input) {//名字排序qsort(pc->data, pc->sz, sizeof(struct PeoInfo), cmp_by_name); } else {//年龄排序qsort(pc->data, pc->sz, sizeof(struct PeoInfo), cmp_by_age); }}//保存通讯录void SaveContact(struct Contact* pc){ assert(pc); int i = 0; FILE* pfWrite = fopen("contact.txt", "wb"); 把当前程序的有效联系人写入文件 if (NULL == pfWrite)//判断是否为空指针 {perror("open file for writting"); return; } //写数据 for (i = 0; i < pc->sz; i++) {fwrite(pc->data+i, sizeof(struct PeoInfo), 1, pfWrite); //进行写入 } fclose(pfWrite); //关闭文件 pfWrite = NULL; //置为空指针}

contact.h头文件代码如下：

#pragma once#include #include #include #include #define DEFAULT 3#define NAME_MAX 20#define SEX_MAX 10#define TELE_MAX 12#define ADDR_MAX 50#define MAX 1000//描述联系人的信息struct PeoInfo{ char name[NAME_MAX]; int age; char sex[SEX_MAX]; char tele[TELE_MAX]; char addr[ADDR_MAX]; }; //通讯录-动态增长版本struct Contact{ struct PeoInfo* data; int sz; //通讯录中当前有效元素个数 int capacity; //通讯录的当前最大容量}; //增容void CheckCapacity(struct Contact* pc); //初始化通讯录void InitContact(struct Contact* pc); //销毁通讯录void DestroyContact(struct Contact* pc); //增加联系人void AddContact(struct Contact* pc); //显示通讯录void ShowContact(const struct Contact* pc); //删除指定联系人void DelContact(struct Contact* pc); //查找指定联系人void SearchContact(const struct Contact* pc); //修改指定联系人void ModifyContact(struct Contact* pc); //排序通讯录void SortContact(struct Contact* pc); //保存通讯录到文件void SaveContact(struct Contact* pc); //加载通讯录void LoadContact(struct Contact* pc);

程序运行：