C++学习（4）——通讯录管理程序

复习简单操作，实现一个非常非常简单的通讯录管理小程序

#include <iostream>
using namespace std;
#include <string>
constexpr auto MAX = 1000; //通讯录最大人数;

//设计联系人结构体
struct Person{
	string m_Name;   //姓名
	int m_Sex;   //性别
	int m_Age;	//年龄
	string m_Phone;	//电话
	string m_Addr;	//住址
};

//设计通讯录结构体
struct Addressbooks{
	//通讯录中保存的联系人数组
	struct  Person personArray[MAX];
	//通讯录中当前记录联系人个数
	int m_Size;
};

//1、添加联系人
void addPerson(Addressbooks *abs){
	//判断通讯录是否已满，满了则不再添加
	if (abs->m_Size == MAX){
		cout << "通讯录已满，无法添加" << endl;
		return;
	}
	else {
		//添加具体联系人

		//姓名
		string name;
		cout << "请输入姓名：" << endl;
		cin >> name;
		abs->personArray[abs->m_Size].m_Name = name;
		//性别
		cout << "请输入性别：" << endl;
		cout << "1——男" << endl;
		cout << "2——女" << endl;
		int sex = 0;
		while (true) {
			cin >> sex;
			if (sex == 1 || sex == 2) {
				abs->personArray[abs->m_Size].m_Sex = sex;
				break;
			}
			cout << "输入有误，请重新输入" << endl;
		}
		//年龄
		cout << "请输入年龄：" << endl;
		int age = 0;
		cin >> age;
		abs->personArray[abs->m_Size].m_Age = age;
		//电话
		cout << "请输入联系电话：" << endl;
		string phone;
		cin >> phone;
		abs->personArray[abs->m_Size].m_Phone = phone;
		//住址
		cout << "请输入家庭住址：" << endl;
		string address;
		cin >> address;
		abs->personArray[abs->m_Size].m_Addr = address;
		//更新通讯录人数
		abs->m_Size++;
		cout << "添加成功" << endl;

		system("pause");  //请按任意键继续
		system("cls");  //清屏功能
	}
}

//2、显示联系人
void showPerson(Addressbooks *abs) {
	//判断通讯录中人数是否为0
	if (abs->m_Size == 0) {
		cout << "当前记录为空" << endl;
	}
	//不为0时，显示联系人信息
	else {
		for (int i = 0; i < abs->m_Size; i++) {
			cout << "姓名：" << abs->personArray[i].m_Name << "\t";
			cout << "性别：" << (abs->personArray[i].m_Sex  == 1?"男":"女")<< "\t";
			cout << "年龄：" << abs->personArray[i].m_Age << "\t";
			cout << "电话：" << abs->personArray[i].m_Phone << "\t";
			cout << "住址：" << abs->personArray[i].m_Addr << endl;
		}
	}
		system("pause");
		system("cls");
}

//3、删除联系人
/*检测联系人是否存在*/
int isExist(Addressbooks *abs,string name){
	for (int i = 0; i < abs->m_Size; i++) {
		if (abs->personArray[i].m_Name == name) {
			return i;
		}
	}
	return -1;
}
/*删除指定联系人*/
void deletePerson(Addressbooks *abs) {
	cout << "请输入您要删除的联系人：" << endl;
	string name;
	cin >> name;

	int ret = isExist(abs, name);

	if (ret != -1) {
		for (int i = ret; i < abs->m_Size; i++) {
			abs->personArray[i] = abs->personArray[i + 1];
		}
		abs->m_Size--;
		cout << "删除成功" << endl;
	}
	else {
		cout << "查无此人" << endl;
	}
	system("pause");  //请按任意键继续
	system("cls");  //清屏功能
}

//4、查找联系人
void findPerson(Addressbooks *abs) {
	cout << "请输入您要查找的联系人：" << endl;
	string name;
	cin >> name;
	
	int ret = isExist(abs, name);

	if (ret != -1) {
		cout << "姓名：" << abs->personArray[ret].m_Name<<"\t";
		cout << "性别：" << (abs->personArray[ret].m_Sex == 1 ? "男" : "女") << "\t";
		cout << "年龄：" << abs->personArray[ret].m_Age << "\t";
		cout << "电话：" << abs->personArray[ret].m_Phone << "\t";
		cout << "住址：" << abs->personArray[ret].m_Addr << endl;

	}
	else {
		cout << "查无此人" << endl;
	}
	system("pause");  //请按任意键继续
	system("cls");  //清屏功能
}

//5、修改联系人
void modefyPerson(Addressbooks *abs) {
	cout << "请输入您要修改的联系人：" << endl;
	string name;
	cin >> name;

	int ret = isExist(abs, name);
	if (ret!=-1){
		//姓名
		string name;
		cout << "请输入姓名：" << endl;
		cin >> name;
		abs->personArray[ret].m_Name = name;
		//性别
		int sex=0;
		cout << "请输入性别：" << endl;
		cout << "1——男" << endl;
		cout << "2——女" << endl;
		while (true) {
			cin >> sex;
			if (sex == 1 || sex == 2) {
				abs->personArray[ret].m_Sex = sex;
				break;
			}
			cout << "输入有误，请重新输入" << endl;
		}
		//年龄
		cout << "请输入年龄：" << endl;
		int age = 0;
		cin >> age;
		abs->personArray[ret].m_Age = age;
		//电话
		cout << "请输入联系电话：" << endl;
		string phone;
		cin >> phone;
		abs->personArray[ret].m_Phone = phone;
		//住址
		cout << "请输入家庭住址：" << endl;
		string address;
		cin >> address;
		abs->personArray[ret].m_Addr = address;
	}
	else {
		cout << "查无此人" << endl;
	}
	system("pause");  //请按任意键继续
	system("cls");  //清屏功能
}

//6、清空联系人
void cleanPerson(Addressbooks *abs) {
	abs->m_Size = 0;   //静态内存在进程结束时自动释放，无需其他操作
	cout << "通讯录已清空" << endl;
	system("pause");  //请按任意键继续
	system("cls");  //清屏功能
}

//菜单界面
void showMenu()
{
	cout << "***************************" << endl;
	cout << "*****  1、添加联系人  *****" << endl;
	cout << "*****  2、显示联系人  *****" << endl;
	cout << "*****  3、删除联系人  *****" << endl;
	cout << "*****  4、查找联系人  *****" << endl;
	cout << "*****  5、修改联系人  *****" << endl;
	cout << "*****  6、清空联系人  *****" << endl;
	cout << "*****  0、退出通讯录  *****" << endl;
	cout << "***************************" << endl;
}

int main()
{
	//创建通讯录的结构体变量
	Addressbooks abs;
	//初始化通讯录中当前人员个数
	abs.m_Size = 0;

	int select = 0;   //创建用户选择输入的变量

	while (true)
	{
		//菜单调用
		showMenu();

		cin >> select;

		switch (select)
		{
		case 1:     //1、添加联系人
			addPerson(&abs);   //利用地址传递通过修改形参来修改实参
			break;
		case 2:     //2、显示联系人
			showPerson(&abs);
			break;
		case 3:     //3、删除联系人
			deletePerson(&abs);
			break;
		case 4:     //4、查找联系人
			findPerson(&abs);
			break;
		case 5:     //5、修改联系人
			modefyPerson(&abs);
			break;
		case 6:     //6、清空联系人
			break;
		case 0:     //0、退出通讯录
			cout << "欢迎下次使用" << endl;
			system("pause");
			return 0;
			break;
		default:
			break;
		}
	}

	system("pause");
	return 0;
}