【C语言】实现一个通讯录

目的：

1. 可以增容
2. 通讯录可以用来存储无上限数量的人的信息，每个人的信息包括：姓名、性别、年龄、电话、住址

提供方法： 

1. 添加联系人信息
2. 删除指定联系人信息
3. 查找指定联系人信息
4. 修改指定联系人信息 
5. 显示所有联系人信息
6. 清空所有联系人
7. 排序所有联系人 

Contact.h

#ifndef __CONTACT_H__
#define __CONTACT_H__

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>

#define DEFAULT_SZ 3

#define NAME_MAX 20
#define SEX_MAX 5
#define TELE 12
#define ADDR 30
#define MAX 1000

typedef struct PeoInfo
{
	char name[NAME_MAX];
	int age;
	char sex[SEX_MAX];
	char tele[TELE];
	char addr[ADDR];
}PeoInfo;

//动态版本
typedef struct Contact
{
	PeoInfo *data;//存放数据
	int sz;//当前已有信息的个数
	int capacity;//当前最大容量
}Contact, *pContact;



void InitContact(pContact pc);
void DestroyContact(pContact pc);

void AddContact(pContact pc);
void ShowContact(pContact pc);
void DelContact(pContact pc);
void SearchContact(pContact pc);
void ModifyContact(pContact pc);
void SortContact(pContact pc);
void EmptyContact(pContact pc);

#endif  // __CONTACT_H__

Contact.c

#define _CRT_SECURE_NO_WARNINGS 1

#include "Contact.h"

void InitContact(pContact pc)
{
	assert(pc);
	pc->sz = 0;
	pc->data = (PeoInfo*)malloc(DEFAULT_SZ * sizeof(PeoInfo));
	pc->capacity = DEFAULT_SZ;
}

void DestroyContact(pContact pc)
{
	assert(pc);
	free(pc->data);
	pc->data = NULL;
	pc->capacity = 0;
	pc->sz = 0;
}


void *check_capacity(pContact pc)
{
	assert(pc);
	if (pc->sz == pc->capacity)
	{
		PeoInfo *tmp = realloc(pc->data, (pc->capacity + 2)*sizeof(PeoInfo));
		if (tmp != NULL)
		{
			pc->data = tmp;
			pc->capacity += 2;
			printf("增容成功！\n");
			return pc->data;
		}
		else
		{
			return NULL;
		}
	}
	return pc->data;
}

void AddContact(pContact pc)
{
	assert(pc);
	if (check_capacity(pc) == NULL)
	{
		return;
	}

	//添加
	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);
	pc->sz++;
}

void ShowContact(pContact pc)
{
	int i = 0;
	assert(pc);
	printf("%10s\t%4s\t%5s\t%12s\t%20s\n", "name", "age", "sex", "tele", "addr");
	for (i = 0; i < pc->sz; i++)
	{
		printf("%10s\t%4d\t%5s\t%12s\t%20s\n", 
			pc->data[i].name, 
			pc->data[i].age, 
			pc->data[i].sex, 
			pc->data[i].tele, 
			pc->data[i].addr);
	}
}

static int FindEntry(pContact pc,char name[])
{
	int i = 0;
	assert(pc);
	for (i = 0; i < pc->sz; i++)
	{
		if (strcmp(pc->data[i].name, name)==0)
		{
			return i;
		}
	}
	return -1;//没找到
}

void DelContact(pContact pc)
{
	int i = 0;
	int j = 0;
	int pos = 0;
	char name[NAME_MAX] = { 0 };
	assert(pc);
	if (pc->sz == 0)
	{
		printf("通讯录已满，无法删除！");
		return;
	}
	printf("请输入删除人的名字:>");
	scanf("%s", name);
	//1.查找
	pos = FindEntry(pc, name);
	//2.删除
	if (pos != -1)
	{
		for (j = pos; j < pc->sz - 1; j++)
		{
			pc->data[j] = pc->data[j + 1];
		}
		pc->sz--;
	}
	else
	{
		printf("要删除的人不存在！");
	}
}

void SearchContact(pContact pc)
{
	char name[NAME_MAX] = { 0 };
	int pos = 0;
	printf("请输入要查找人的名字:>");
	scanf("%s", name);
	pos = FindEntry(pc, name);
	if (pos == -1)
	{
		printf("要查找的人不存在！\n");
	}
	else
		printf("%10s\t%4s\t%5s\t%12s\t%20s\n", "name", "age", "sex", "tele", "addr");
	{
		printf("%10s\t%4d\t%5s\t%12s\t%20s\n",
			pc->data[pos].name,
			pc->data[pos].age,
			pc->data[pos].sex,
			pc->data[pos].tele,
			pc->data[pos].addr);

	}
}

void ModifyContact(pContact pc)
{
	char name[NAME_MAX] = { 0 };
	int pos = 0;
	printf("请输入要修改人的名字:>");
	scanf("%s", name);
	pos = FindEntry(pc, name);
	if (pos == -1)
	{
		printf("要修改的人不存在！\n");
	}
	else
	{
		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("请输入电话:>");
		scanf("%s", pc->data[pos].tele);
		printf("请输入地址:>");
		scanf("%s", pc->data[pos].addr);
	}
}

void SortContact(pContact pc)
{
	int i = 0;
	int j = 0;
	assert(pc);
	for (i = 0; i < pc->sz - 1; i++)
	{
		int flag = 0;
		for (j = 0; j<pc->sz - 1 - i; j++)
		{
			if (pc->data[j].age>pc->data[j + 1].age)
			{
				PeoInfo tmp = pc->data[j];
				pc->data[j] = pc->data[j + 1];
				pc->data[j + 1] = tmp;
				flag = 1;
			}
		}
		if (flag == 0)
			break;
	}
}

void EmptyContact(pContact pc)
{
	pc->sz = 0;
	printf("通讯录清空\n");
}

test.c

#define _CRT_SECURE_NO_WARNINGS 1

#include "Contact.h"

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          7.empty   ****\n");
	printf("****************************************\n");
}

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

void test()
{
	int input = 0;
	Contact con;//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:
			ModifyContact(&con);
			break;
		case SHOW:
			ShowContact(&con);
			break;
		case SORT:
			SortContact(&con);
			break;
		case EXIT:
			DestroyContact(&con);
			printf("退出通讯录!\n");
			break;
		case EMPTY:
			EmptyContact(&con);
			break;
		default:
			printf("选择错误!\n");
			break;
		}
	} while (input);
}

int main()
{
	test();
	system("pause");
	return 0;
}