[C++知识库]通讯录的实现

1.构造通讯录

#pragma once
#define _CRT_SECURE_NO_WARNINGS 1
#include<string.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include<stdlib.h>
#define MAX 1000
#define NAME_MAX 20
#define SEX_MAX 5
#define ADDR_MAX 30
#define TELE_MAX 12
typedef struct PeoInfo
{
	char name[NAME_MAX];
	int age;
	char sex[SEX_MAX];
	char addr[ADDR_MAX];
	char tele[TELE_MAX];
}PeoInfo;
//通讯录的结构体
typedef struct Contact
{
	PeoInfo data[MAX];//存放数据
	int sz;//通讯录中有效信息的个数
}Contact;


动态版
typedef struct Contact
{
	PeoInfo* data;//存放数据
	int sz;//通讯录中有效信息的个数
	int capacity;
}Contact;

2.基本框架

enum Oprion
{
	EXIT,
	ADD,
	DEL,
	SEARCH,
	MODIFY,
	SORT,
	SHOW,
	DEST
};
void menu()
{
	printf("***************************************\n");
	printf("********     1.add      2.del     *****\n");
	printf("********     3.search   4.modify  *****\n");
	printf("********     5.sort     6.show    *****\n");
	printf("********     7.destory  0.exit    *****\n");
	printf("***************************************\n");
}
int main()
{
	int input = 0;
	Contact con = { 0 };//通讯录
	//初始化通讯录
	InitContact(&con);
	do
	{
	    menu();
		printf("请选选择:>");
		scanf("%d", &input);
		switch (input)
		{
		case ADD:
			AddContact(&con);
			break;
		case DEL:
			DeleteContact(&con);
			break;
		case SEARCH:
			SearchContact(&con);
			break;
		case MODIFY:
			ModifyContact(&con);
			break;
		case SORT:
			SortContact(&con);
			break;
		case SHOW:
			ShowContact(&con);
			break;
		case EXIT:
			printf("退出通讯录\n");
			break;
		case DEST:
			destoryContact(&con);
			break;
		default:
			printf("选择错误\n");
			break;
		}
	} while (input);
	return 0;
}

3.实现每个功能

1.初始化

void InitContact(Contact* pc)
{
	assert(pc);
	pc->sz = 0;
	memset(pc->data, 0, sizeof(pc->data));
}




//动态版
void InitContact(Contact* pc)
{
	assert(pc);
	pc->sz = 0;
	pc->data = (PeoInfo*)malloc(DEFAULT_SZ * sizeof(PeoInfo));
	pc->capacity = DEFAULT_SZ;

}

2.增加联系人?

//动态版
void check_capacity(Contact* pc)
{
	assert(pc);

	if (pc->sz == pc->capacity)
	{
		PeoInfo* tmp = (PeoInfo*)realloc(pc->data, (pc->capacity + 2) * sizeof(PeoInfo));
		if (tmp != NULL)
		{
			pc->data = tmp;
			pc->capacity += 2;
			printf("增容成功\n");
		}
		else
		{
			printf("check_capacity()::%s\n", strerror(errno));
		}
	}
}



void AddContact(Contact* pc)
{
	assert(pc);
  //check_capacity(pc);
	if (pc->sz == MAX)
	{
		printf("通讯录满了，无法添加\n");
		return;
	}
	//输入联系人
	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++;
	printf("增加联系人成功\n");
}

3.展示联系人?

void ShowContact(const Contact* pc)
{
	assert(pc);
	if (pc->sz == 0)
    {
		printf("无联系人\n");
		return;
	}
	int i = 0;
	printf("%-10s\t%-5s\t%-5s\t%-13s\t%-20s\n", "名字", "年龄", "性别", "电话", "地址");
	for (i = 0; i < pc->sz; i++)
	{
		printf("%-10s\t%-5d\t%-5s\t%-13s\t%-20s\n",
			pc->data[i].name, pc->data[i].age, pc->data[i].sex, pc->data[i].tele, pc->data[i].addr);
	}
}

4.删除联系人?

将查找联系人的函数分离出来，找到该联系人，返回其下标
int FindByName(const Contact* pc, char name[])
{
	int i = 0;
	for (i = 0; i < pc->sz; i++)
	{
		if (strcmp(pc->data[i].name, name) == 0)
		{
			return i;
		}
	}

	return -1;//找不到
}

void DeleteContact(Contact* pc)
{
	char name[NAME_MAX] = { 0 };
	if (pc->sz == 0)
	{
		printf("通讯录为空，无法删除\n");
		return;
	}
	printf("请输入要删除人的名字:>");
	scanf("%s", name);
	//查找指定联系人
	int pos = FindByName(pc, name);
	if (pos == -1)
	{
		printf("要删除的人不存在\n");
		return;
	}
	else
	{
		//删除
		int j = 0;
		for (j = pos; j < pc->sz - 1; j++)
		{
			pc->data[j] = pc->data[j + 1];
		}
		pc->sz--;

		printf("删除指定联系人成功\n");
	}
}

5.查找联系人

void SearchContact(Contact* pc)
{
	char name[NAME_MAX] = { 0 };
	if (pc->sz == 0)
	{
		printf("通讯录为空，无法查找\n");
		return;
	}
	printf("请输入要查找人的名字:>");
	scanf("%s", name);
	int pos = FindByName(pc, name);
	if (pos == -1)
	{
		printf("要查找的人不存在\n");
		return;
	}
	else
	{
		printf("%-10s\t%-5s\t%-5s\t%-13s\t%-20s\n", "名字", "年龄", "性别", "电话", "地址");
		printf("%-10s\t%-5d\t%-5s\t%-13s\t%-20s\n", 
			pc->data[pos].name, pc->data[pos].age, pc->data[pos].sex, pc->data[pos].tele, pc->data[pos].addr);
	}
}

?6.修改联系人

void ModifyContact(Contact* pc)
{
	printf("请选择要修改的联系人\n");
	char name[NAME_MAX] = { 0 };
	if (pc->sz == 0)
	{
		printf("通讯录为空，无法修改\n");
		return;
	}
	printf("请输被修改人的名字:>");
	scanf("%s", name);
	int pos = FindByName(pc, name);
	if (pos == -1)
	{
		printf("被修改的人不存在\n");
		return;
	}
	else
	{
		printf("%-10s\t%-5s\t%-5s\t%-13s\t%-20s\n", "名字", "年龄", "性别", "电话", "地址");
		printf("%-10s\t%-5d\t%-5s\t%-13s\t%-20s\n",
			pc->data[pos].name, pc->data[pos].age, pc->data[pos].sex, pc->data[pos].tele, pc->data[pos].addr);
		printf("请输入要被修改的内容\n");
		printf("****1.名字******2.年龄**********\n");
		printf("****3.性别******4.电话**********\n");
		printf("****5.住址**********************\n");
		int input = 0;
		scanf("%d", &input);
		switch(input)
		{case 1:
			printf("请重新输入姓名\n");
			scanf("%s", pc->data[pos].name);
			printf("修改成功\n");
			break;
		case 2:
			printf("请重新输入年龄\n");
			scanf("%d", &(pc->data[pos].age));
			printf("修改成功\n");
			break;
		case 3:
			printf("请重新输入性别\n");
			scanf("%s", pc->data[pos].sex);
			printf("修改成功\n");
			break;
		case 4:
			printf("请重新输入电话\n");
			scanf("%s", pc->data[pos].tele);
			printf("修改成功\n");
			break;
		case 5:
			printf("请重新输入地址\n");
			scanf("%s", pc->data[pos].addr);
			printf("修改成功\n");
			break;
		default:
			printf("选择错误\n");
			break;
		}
	}
}

7.对联系人进行排序?

int compare_by_age(const void* e1,const void* e2)
{
	return ((PeoInfo*)e1)->age - ((PeoInfo*)e2)->age;
	

}
int compare_by_name(const void* e1, const void* e2)
{
	return strcmp(((PeoInfo*)e1)->name, ((PeoInfo*)e2)->name);
	
}

void SortContact(Contact* pc)
{
	printf("*****1.名字*****2.年龄*****\n");
	printf("请选择排序的方法\n");
	int input = 0;
	scanf("%d",&input);
	switch (input)
	{case 1:
		qsort(pc->data, pc->sz, sizeof(pc->data[0]), compare_by_name);
		printf("按名字排序成功\n");
		break;
	case 2:
		qsort((pc->data), pc->sz, sizeof(pc->data[0]), compare_by_age);
		printf("按年龄排序成功\n");
		break;
	default:
		printf("选择错误\n");
		break;
	}
}

8.销毁通讯录

void destoryContact(Contact* pc)
{
	pc->sz = 0;
	memset(pc->data, 0, sizeof(pc->data));
	printf("以清空所有联系人\n");
}

//动态版
void destoryContact(Contact* pc)
{
	free(pc->data);
	pc->data = NULL;
	pc->sz = 0;
	pc->capacity = 0;
	printf("以清空所有联系人\n");
}