动态通讯录（可以文件形式写入与读出）

//contact.h
#pragma once
#include <stdio.h>
#include<string.h>
#include<stdlib.h>
#include<assert.h>


#define DEFAULT_SZ 3
#define INC_SZ 2


#define MAX 100
#define MAX_NAME 20
#define MAX_SEX 10
#define MAX_TELE 12
#define MAX_ADDR 30

typedef struct PeoInfo
{
	char name[MAX_NAME];
	int age;
	char sex[MAX_SEX];
	char tele[MAX_TELE];
	char addr[MAX_ADDR];
}PeoInfo;

typedef struct Contact
{
	PeoInfo* data;//存放信息
	int count;//记录个数
	int capacity;//当前容量
}Contact;


//初始化通讯录
int InitContact(Contact* pc);

//销毁通讯录
void DestroyContact(Contact* pc);

//增加项目
void AddContact(Contact* pc);

//打印通讯录
void ShowContact(const Contact* pc);

//删除指定联系人
void DeleContact(Contact* pc);

//查找指定联系人
void SearchContact(Contact* pc);

//修改指定联系人
void ModContact(Contact* pc);

//排序通讯录
void SortContact(Contact* pc);

//保存通讯录的信息到文件
void SaveContact(const Contact* pc);

//加载文件的信息到通讯录
void LoadContact(Contact* pc);

//test.c
#define _CRT_SECURE_NO_WARNINGS 1
#include "Contact.h"

enum option
{
	EXIT,
	ADD,
	DEL,
	SEARCH,
	MODIFY,
	SHOW,
	SORT,
};

void menu()
{
	printf("************************************************\n");
	printf("**********  1.add        2.del      ************\n");
	printf("**********  3.search     4.modify   ************\n");
	printf("**********  5.show       6.sort     ************\n");
	printf("**********  0.exit                  ************\n");
	printf("************************************************\n");
}
int main()
{
	int input = 0;
	Contact con;
	//初始化
	InitContact(&con);
	do
	{
		menu();
		printf("请选择:>");
		scanf("%d", &input);
		switch (input)
		{
		case EXIT:
			printf("退出通讯录");
			SaveContact(&con);
			break;
		case ADD:
			AddContact(&con);
			break;
		case DEL:
			DeleContact(&con);
			break;
		case SEARCH:
			SearchContact(&con);
			break;
		case MODIFY:
			ModContact(&con);
			break;
		case SHOW:
			ShowContact(&con);
			break;
		case SORT:
			SortContact(&con);
			break;
		
		default:
			printf("选择错误");
			break;
		}

	} while (input);
	return 0;
}

//contact.h
#define _CRT_SECURE_NO_WARNINGS 1
#include"Contact.h"

void CheckCapacity(Contact* pc)
{
	if (pc->count == pc->capacity)
	{
		PeoInfo* ptr = (PeoInfo*)realloc(pc->data, (pc->capacity + INC_SZ) * sizeof(PeoInfo));
		if (ptr == NULL)
		{
			printf("AddContact::%s\n", strerror(errno));
			return;
		}
		else
		{
			pc->data = ptr;
			pc->capacity += INC_SZ;
			printf("增容成功\n");
		}
	}
}

void LoadContact(Contact* pc)
{
	FILE* pfRead = fopen("contact.txt", "rb");
	if (pfRead == NULL)
	{
		perror("LoadContact");
		return;
	}
	PeoInfo tmp = { 0 };

	while (fread(&tmp, sizeof(PeoInfo), 1, pfRead) == 1)
	{
		CheckCapacity(pc);

		pc->data[pc->count] = tmp;
		pc->count++;
	}

	fclose(pfRead);
	pfRead = NULL;
}


int InitContact(Contact* pc)
{
	assert(pc);
	pc->count = 0;
	pc->data = (PeoInfo*)calloc(DEFAULT_SZ, sizeof(PeoInfo));
	if (pc->data == NULL)
	{
		printf("InitContact::%s\n", strerror(errno));
		return 1;
	}
	pc->capacity = DEFAULT_SZ;
	
	LoadContact(pc);
	return 0;
}

void DestroyContact(Contact* pc)
{
	assert(pc);
	free(pc->data);
	pc->data = NULL;
}

void AddContact(Contact* pc)
{
	assert(pc);
	//增容
	CheckCapacity(pc);
	//
	printf("请输入名字:>");
	scanf("%s", pc->data[pc->count].name);
	printf("请输入年龄:>");
	scanf("%d", &(pc->data[pc->count].age));
	printf("请输入性别:>");
	scanf("%s", pc->data[pc->count].sex);
	printf("请输入电话:>");
	scanf("%s", pc->data[pc->count].tele);
	printf("请输入地址:>");
	scanf("%s", pc->data[pc->count].addr);

	pc->count++;
	printf("增加成功\n");
}

void ShowContact(const Contact* pc)
{
	assert(pc);
	if (pc->count == 0)
	{
		printf("通讯录无内容，请先增加项目\n");
		return;
	}
	int i = 0;
	printf("%-20s\t%-5s\t%-5s\t%-12s\t%-30s\n", "姓名", "年龄", "性别", "号码", "地址");
	for (i = 0; i < pc->count; i++)
	{
		printf("%-20s\t%-5d\t%-5s\t%-12s\t%-30s\n", pc->data[i].name,
			pc->data[i].age,
			pc->data[i].sex,
			pc->data[i].tele,
			pc->data[i].addr);
	}
}

static int FindByName(Contact* pc, char name[])
{
	assert(pc);
	int i = 0;
	for (i = 0; i < pc->count; i++)
	{
		if (0 == strcmp(name, pc->data[i].name))
			return i;
	}
	return -1;
}
void DeleContact(Contact* pc)
{
	assert(pc);
	if (pc->count == 0)
	{
		printf("通讯录无内容，无法删除项目\n");
		return;
	}
	printf("请输入要删除人的名字:>");
	char name[MAX_NAME] = { 0 };
	scanf("%s", name);
	int i = 0;
	int pos = FindByName(pc, name);
	if (pos == -1)
	{
		printf("要删除的人不存在\n");
		return;
	}
	for (i = pos; i < pc->count - 1; i++)
	{
		pc->data[i] = pc->data[i + 1];
	}
	pc->count--;
	printf("删除成功\n");
}

void SearchContact(Contact* pc)
{
	assert(pc);
	if (pc->count == 0)
	{
		printf("通讯录为空，无法查找\n");
		return;
	}
	printf("请输入要查找人的名字:>");
	char name[MAX_NAME] = { 0 };
	scanf("%s", name);
	int pos = FindByName(pc, name);
	if (pos == -1)
	{
		printf("要查找的人不存在\n");
		return;
	}
	printf("%-20s\t%-5s\t%-5s\t%-12s\t%-30s\n", "姓名", "年龄", "性别", "号码", "地址");
	printf("%-20s\t%-5d\t%-5s\t%-12s\t%-30s\n", pc->data[pos].name,
		pc->data[pos].age,
		pc->data[pos].sex,
		pc->data[pos].tele,
		pc->data[pos].addr);
}


void  ModContact(Contact* pc)
{
	assert(pc);
	if (pc->count == 0)
	{
		printf("通讯录为空，无法查找\n");
		return;
	}
	printf("请输入要修改人的名字:>");
	char name[MAX_NAME] = { 0 };
	scanf("%s", name);
	int pos = FindByName(pc, name);
	if (pos == -1)
	{
		printf("要修改的人不存在\n");
		return;
	}
	printf("已经查找到，请修改\n");
	//开始修改
	printf("请输入名字:>");
	scanf("%s", pc->data[pos].name);
	printf("请输入年龄:>");
	scanf("%d", &pc->data[pos].age);
	printf("请输入性别:>");
	scanf("%s", pc->data[pos].sex);
	printf("请输入号码:>");
	scanf("%s", pc->data[pos].tele);
	printf("请输入地址:>");
	scanf("%s", pc->data[pos].addr);

	printf("修改成功\n");

}

int cmp_peo_by_name(const void* e1, const void* e2)
{
	return strcmp(((PeoInfo*)e1)->name, ((PeoInfo*)e2)->name);
}
void SortContact(Contact* pc)
{
	assert(pc);
	qsort(pc->data, pc->count, sizeof(PeoInfo), cmp_peo_by_name);
	printf("排序成功\n");
}

void SaveContact(const Contact* pc)
{
	assert(pc);
	FILE* pfWrite = fopen("contact.txt", "wb");
	if (pfWrite == NULL)
	{
		perror("SaveContact");
		return;
	}
	//写文件
	int i = 0;
	for (i = 0; i < pc->count; i++)
	{
		fwrite(pc->data + i, sizeof(PeoInfo), 1, pfWrite);
	}

	fclose(pfWrite);
	pfWrite = NULL;
}