C语言如何实现简单通讯录

#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 1

typedef 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

#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");
 }
}

#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;
}