c++通讯录管理系统

需求

1添加联系人!

2显示联系人:

3删除联系人:

信息包括(姓名、性别、年龄、联系电话、家庭住址)

4查找联系人按照姓名查看指定联系人信息

5修改联系人

按照姓名重新修改指定联系人

6清空联系人

0退出通讯录:退出当前使用的通讯录

代码

#include<iostream>
#include<string>
using namespace std;
//0、菜单界面
//封装函数显示界面 void showMenu()
//在main函数中调用封装好的函数
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;

}
//联系人结构体：姓名、性别、年龄、联系电话、家庭住址
struct Person
{
	//姓名
	string m_Name;
	
	//性别
	int m_Sex;
	//年龄
	int m_Age;
	//电话
	string m_Phone;
	//住址
	string m_Addr;
};
//通讯录结构体
#define MAX 1000
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)//地址 传一个指针用来接受地址
{
	//判断通讯录是否已满，满了就不要添加
	if (abs->m_Size == MAX)
	{
		cout << "通讯录已经满了，无法添加" << endl;
		return;
	}
	else
	{
		//添加具体的联系人
		//姓名
		string name;
		cout << "请输入姓名：" << endl;
		cin >> name;
		abs->personArray[abs->m_Size].m_Name = name;

		//性别
		int sex;
		cout << "请输入性别：" << endl;
		cout << "1代表男" << endl;
		cout << "2代表女" << endl;

		while (true)
		{
			cin >> sex;
			if (sex == 1 || sex == 2)
			{
				abs->personArray[abs->m_Size].m_Sex = sex;
				break;
			}
			cout << "输入有误，请输入数字"1"或"2"" << endl;
		}


		//年龄
		int age;
		cout << "请输入年龄：" << endl;
		cin >> age;
		abs->personArray[abs->m_Size].m_Age = age;
		//电话
		string num;
		cout << "请输入电话：" << endl;
		cin >> num;
		abs->personArray[abs->m_Size].m_Phone = num;
		//地址
		string addr;
		cout << "请输入地址：" << endl;
		cin >> addr;
		abs->personArray[abs->m_Size].m_Addr = addr;
		//更新通讯录人数
		abs->m_Size++;
		cout << "更新成功" << endl;
		system("pause");//请按任意键继续
		system("cls");//清屏
	}
}

//2、显示联系人
	void showPerson(Addressbooks *abs)
	{
		//判断人数是否为0
		if (abs->m_Size == 0)
		{
			cout << "当前输入为空" << endl;
		}
		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";//三目运算符
				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，存在返回联系人的位置，否则返回-1
	int isExist(Addressbooks *abs, string name)//通讯录，对比的名称
	{
		for (int i = 0; i < abs->m_Size; i++)
		{
			if (abs->personArray[i].m_Name == name)
			{
				return i;
			}
		}
		return -1;//没有这个name
	}
	void deletePerson(Addressbooks *abs)
	{
		cout << "请输入你要删除的联系人：" << endl;
		string name;
		cin >> name;
		int ret = isExist(abs, name);
		if (ret == -1)cout << "查无此人" << endl;
		else
		{
			//查到此人
			for (int i = ret; i < abs->m_Size - 1; i++)
			{
				abs->personArray[i] = abs->personArray[i + 1];
			}
			abs->m_Size--;
			cout << "删除成功" << endl;
		}
		system("pause");
		system("cls");
	}
//4、查找联系人
	void findPerson(Addressbooks *abs)
	{
		cout << "请输入你要查找的联系人的名字：" << endl;
		string name;
		cin >> name;
		int ret = isExist(abs, name);
		if (ret == -1)cout << "查无此人"<<endl;
		else
		{
			cout << "你查找的联系人信息如下：" << endl;
			cout << "姓名：" << abs->personArray[ret].m_Name << "\t";
			cout << "性别：" << (abs->personArray[ret].m_Sex == 1 ? "男" : "女") << "\t";//三目运算符
			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;
		}
		system("pause");
		system("cls");
	}
//5、修改联系人
	void changePerson(Addressbooks *abs)
	{
		cout << "请输入你要修改的联系人的姓名：" << endl;
		string name;
		cin >> name;
		int ret = isExist(abs,name);

		if (ret == -1)cout << "查无此人" << endl;
		else
		{
			cout << "请输入你要修改后的信息:" << endl;
			//姓名
			string name;
			cout << "请输入姓名：" << endl;
			cin >> name;
			abs->personArray[ret].m_Name = name;

			//性别
			int sex;
			cout << "请输入性别：" << endl;
			cout << "1代表男" << endl;
			cout << "2代表女" << endl;

			while (true)
			{
				cin >> sex;
				if (sex == 1 || sex == 2)
				{
					abs->personArray[ret].m_Sex = sex;
					break;
				}
				cout << "输入有误，请输入数字"1"或"2"" << endl;
			}
			int age;
			cout << "请输入年龄：" << endl;
			cin >> age;
			abs->personArray[ret].m_Age = age;
			//电话
			string num;
			cout << "请输入电话：" << endl;
			cin >> num;
			abs->personArray[ret].m_Phone = num;
			//地址
			string addr;
			cout << "请输入地址：" << endl;
			cin >> addr;
			abs->personArray[ret].m_Addr = addr;
			cout << "更新成功" << endl;
			
		}
		system("pause");//请按任意键继续
		system("cls");//清屏
	}

//6、清空通讯录
	void cleanPerson(Addressbooks *abs)
	{
		abs->m_Size = 0;
		cout << "通讯录已经清空" << endl;
		system("pause");
		system("cls");
	}
int main()
{
	//创建通讯录结构体变量
	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



	//菜单的调用
	
	while (true)
	{
		showMenu();
		cin >> select;
		switch (select)
		{
		case 1://1、添加联系人
			addPerson(&abs);//利用地址传递，可以修饰实参
			break;
		case 2://显示联系人
			showPerson(&abs);
			break;
		case 3://删除联系人
		//{
		//	cout << "请输入删除联系人的姓名：" << endl;
		//	string name;
		//	cin >> name;
		//	if (isexist(&abs, name) == -1)cout << "查无此人" << endl;
		//	else
		//		cout << "找到此人" << endl;
		deletePerson(&abs);
		//	break;
		//}
		case 4://查找联系人
			findPerson(&abs);
			break;
		case 5://修改联系人
			changePerson(&abs);
			break;
		case 6://清空联系人
			cleanPerson(&abs);
			break;
		case 0://退出通讯录
			cout << "欢迎下次使用" << endl;
			system("pause");
			return 0;
		default:
			break;
		}
	}
	


	return 0;
}

代码运行结果

我的问题

isExist()里面第一个入口参数为什么是abs不是&abs