动态通讯录实现

#define _CRT_SECURE_NO_WARNINGS 1
#define MAX_size 3
#define MAX_NAME 20
#define MAX_SEX 5
#define MAX_TELE 15
#define MAX_ADDR 30
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
enum Option
{
	EXIT,
	ADD,
	DEL,
	SEARCH,
	MODIFY,
	SHOW
};
//联系人信息
struct PeoInfo
{
	char name[MAX_NAME];
	int age;
	char sex[MAX_SEX];
	char tele[MAX_TELE];
	char addr[MAX_ADDR];
};
//通讯录声明
struct Contact
{
	struct PeoInfo *data;//存放信息
	int capacity;//当前通讯录的最大容量
	int size;//记录当前已有的元素个数
};
//函数声明
//初始化通讯录
void InitContact(struct Contact* ps);
//添加联系人
void AddContact(struct Contact* ps);
//展示通讯录
void ShowContact(const struct Contact* ps);
//删除联系人
void DelContact(struct Contact* ps);
//查找联系人
void SearchContact(const struct Contact* ps);
//修改联系人信息
void ModdifyContact(struct Contact* ps);
//释放动态开辟内存
void DestoryContact(struct Contact* ps);

#include "contact.h"
void InitContact(struct Contact* ps)
{
	ps->data = (struct PeoInfo*)malloc(MAX_size * sizeof(struct PeoInfo));
	if (ps->data == NULL)
		return;
	ps->capacity = MAX_size;
	ps->size = 0;
}
void CheckCap(struct Contact* ps)
{
	if (ps->size == ps->capacity)
	{
		//通讯录已满，进行增容
		struct PeoInfo* str = realloc(ps->data, (ps->capacity + 2) * sizeof(struct PeoInfo));
		if (str != NULL)
		{
			ps->data = str;
			ps->capacity += 2;
			printf("增容成功\n");
		}
		else
			printf("增容失败\n");
	}
}
void AddContact(struct Contact* ps)
{
	//检查通讯录是否有剩余空间
	CheckCap(ps);
	//增加数据
	printf("请输入名字：");
	scanf("%s", ps->data[ps->size].name);
	printf("请输入年龄：");
	scanf("%d", &(ps->data[ps->size].age));
	printf("请输入性别：");
	scanf("%s", ps->data[ps->size].sex);
	printf("请输入电话：");
	scanf("%s", ps->data[ps->size].tele);
	printf("请输入地址：");
	scanf("%s", ps->data[ps->size].addr);
	ps->size++;
	printf("添加成功\n");
}
void ShowContact(const struct Contact* ps)
{
	if (ps->size == 0)
	{
		printf("通讯录为空\n");
	}
	else
	{
		int i = 0;
		printf("%-10s\t%-4s\t%-5s\t%-12s\t%-20s\n", "名字", "年龄", "性别", "电话", "地址");
		for (i = 0; i < ps->size; i++)
		{
			printf("%-10s\t%-4d\t%-5s\t%-12s\t%-20s\n",
				ps->data[i].name,
				ps->data[i].age,
				ps->data[i].sex,
				ps->data[i].tele,
				ps->data[i].addr);
		}
	}
}
static int FindByName(const struct Contact* ps, char name[MAX_NAME])
{
	int i = 0;
	for (i = 0; i < ps->size; i++)
	{
		if (strcmp(ps->data[i].name, name) == 0)
			return i;
	}
	return -1;
}
void DelContact(struct Contact* ps)
{
	char name[MAX_NAME];
	printf("请输入删除人的名字：");
	scanf("%s", name);
	//查找要删除的人在什么位置
	int pos = FindByName(ps, name);//找到返回下标，否则返回-1
	if (pos == -1)
		printf("联系人不存在\n");
	else
	{
		int j = 0;
		for (j = pos; j < ps->size - 1; j++)
			ps->data[j] = ps->data[j + 1];
		ps->size--;
		printf("删除成功\n");
	}
}
void SearchContact(const struct Contact* ps)
{
	char name[MAX_NAME];
	printf("请输入查找人的名字：");
	scanf("%s", name);
	int pos = FindByName(ps, name);
	if (pos == -1)
		printf("联系人不存在\n");
	else
	{
		printf("%-10s\t%-4s\t%-5s\t%-12s\t%-20s\n", "名字", "年龄", "性别", "电话", "地址");
		printf("%-10s\t%-4d\t%-5s\t%-12s\t%-20s\n",
			ps->data[pos].name,
			ps->data[pos].age,
			ps->data[pos].sex,
			ps->data[pos].tele,
			ps->data[pos].addr);
	}
}
void ModdifyContact(struct Contact* ps)
{
	char name[MAX_NAME];
	printf("请输入要修改联系人名字：");
	scanf("%s", name);
	int pos = FindByName(ps, name);
	if (pos == -1)
		printf("要修改的联系人不存在\n");
	else
	{
		printf("请输入年龄：");
		scanf("%d", &(ps->data[pos].age));
		printf("请输入性别：");
		scanf("%s", ps->data[pos].sex);
		printf("请输入电话：");
		scanf("%s", ps->data[pos].tele);
		printf("请输入地址：");
		scanf("%s", ps->data[pos].addr);
		printf("信息已重新修改完成\n");
	}
}
void DestoryContact(struct Contact* ps)
{
	free(ps->data);
	ps->data = NULL;
}

#include "contact.h"
void menu()
{
	printf("** 1.添加  2.删除 **\n");
	printf("** 3.查找  4.修改 **\n");
	printf("** 5.显示  0.退出 **\n");
}
int main()
{
	int input = 0;
	struct Contact con;
	//初始化通讯录
	InitContact(&con);
	do
	{
		menu();
		printf("请选择：");
		scanf("%d", &input);
		switch (input)
		{
		case ADD:
			AddContact(&con);
			break;
		case DEL:
			DelContact(&con);
			break;
		case SEARCH:
			SearchContact(&con);
			break;
		case MODIFY:
			ModdifyContact(&con);
			break;
		case SHOW:
			ShowContact(&con);
			break;
		case EXIT:
			DestoryContact(&con);
			printf("退出通讯录\n");
			break;
		default:
			printf("输入有误，请重新输入：");
			break;
		}
	} while (input);
	return 0;
}