一、先看效果，

1、run

2、查詢

3、入住

再查詢，可以看到201有人入住了

4、 退房

二、安裝C++環境

Visual Studio2019安裝與使用步驟

1、下載vs2019

訪問網站：https://visualstudio.microsoft.com/zh-hans/downloads

2、點擊免費下載：（community版本）

3、安裝

選擇通用windows平臺開發

這個根據個人電腦的性能不同可以消耗的時間也不同，我的電腦大概需要1個小時所有，在安裝的程序中是需要全程聯網的，安裝結束后，會提示重啟電腦，然后我們點擊“立刻重啟”，

安裝完成：

三、新建工程檔案

1、檔案——新建——專案

選擇控制臺程式

把代碼復制到cpp檔案

// ConsoleApplication1.cpp : 此檔案包含 "main" 函式，程式執行將在此處開始并結束，
//

#include <iostream>
#include <string.h>
#include <stdlib.h>
void enter();
void check_in();
void inquire();
void check_out();
void initial_room();
using namespace std;
int i = 0;
struct Room
{
	int number;
	int floor;
	int state;
};
class Customer
{
	char name[10], ID[19];
	int  room_number;
	int  change;
public:
	Customer()
	{
		cout << "請您輸入顧客的姓名\n";
		cin >> name;

		cout << "請您輸入顧客的身份證號碼\n";
		cin >> ID;
		change = 0;
	}
	void set_name(char* _name) { strcpy_s(name, _name); }
	void set_ID(char* _ID) { strcpy_s(ID, _ID); }
	void set_room_number(int n) { room_number = n; }
	char* get_name() { return name; }
	char* get_ID() { return ID; }
	int  get_room_number() { return room_number; }
	~Customer()
	{
		cout << "該顧客退房成功!" << endl;
	}
};
Room room[80];
Customer* customer[80];
int main()
{
	char choice = '1';
	initial_room();
	while (choice == '1')
	{
		enter();
		cout << endl;
		cout << "繼續使用本系統請按\"1\",退出請按\"2\"!  ";
		cin >> choice;
		cout << endl;
	}
}
//系統入口
void enter()
{
	int kind_of_service;
	while (1)
	{
		cout << "請選擇服務類別:訂房、入住、退房還是查詢? \n";
		cout << " 1->查詢  2->入住  3->退房  4->退出:  ";
		cin >> kind_of_service;
		if ((kind_of_service <= 4) && (kind_of_service >= 1))
		{

			switch (kind_of_service)
			{
			case 1: inquire();
				break;
			case 2: check_in();
				break;
			case 3: check_out();
				break;
			case 4: exit(0);
				break;
			}
		}
		else
		{
			cout << "您的輸入有誤，請重試!\n";
			continue;
		}
	}
}
//入住登記
void check_in()
{
	//char name1[10], id1[19];
	customer[i] = new Customer;
	int room_floor;
	cout << "請您選擇預定房間的樓層:\n";
	cout << "1.一樓\n2.二樓\n3.三樓\n4.四樓\n";
	cin >> room_floor;

	switch (room_floor)
	{
		int n;
	case 1:
		for (n = 0; n < 20; n++)
		{
			if (room[n].state == 0)
			{
				cout << "入住房間號碼為: " << room[n].number << endl;
				room[n].state = 1;
				customer[i]->set_room_number(room[n].number);
				break;
			}
		}
		break;
	case 2:
		for (n = 20; n < 40; n++)
		{
			if (room[n].state == 0)
			{
				cout << "入住房間號碼為: " << room[n].number << endl;
				room[n].state = 1;
				customer[i]->set_room_number(room[n].number);
				break;
			}
		}
		break;
	case 3:
		for (n = 40; n < 60; n++)
		{
			if (room[n].state == 0)
			{
				cout << "入住房間號碼為: " << room[n].number << endl;
				room[n].state = 1;
				customer[i]->set_room_number(room[n].number);
				break;
			}
		}
		break;
	case 4:
		for (n = 60; n < 80; n++)
		{
			if (room[n].state == 0)
			{
				cout << "入住房間號碼為: " << room[n].number << endl;
				room[n].state = 1;
				customer[i]->set_room_number(room[n].number);
				break;
			}
		}
		break;
	}
	i++;
}
//退房結算
void check_out()
{
	char name2[10], id2[19];
	int room_number;
	cout << "請輸入要退房的顧客姓名和身份證號碼:\n";
	cin >> name2 >> id2;
	for (int j = 0; j < i; j++)
	{
		if ((strcmp(customer[j]->get_name(), name2) == 0) && (strcmp(customer[j]->get_ID(), id2) == 0))
		{
			room_number = customer[j]->get_room_number();
		}
		cout << endl;
		cout << "是否確定退房,請按1: ";
		char account;
		cin >> account;
		if (account == '1')
		{
			for (int k = 0; k < 80; k++)
			{
				if (room[k].number == customer[j]->get_room_number())
					room[k].state = 0;
			}
			i--;
			for (; j < i; j++)
			{
				customer[j] = customer[j + 1];
			}
			delete customer[i];
		}
	}
}
//資訊查詢
void inquire()
{
	int j, k = 0;
	cout << endl;
	cout << "下列房間還沒人預訂，也沒人入住：" << endl;
	for (j = 0; j < 80; j++)
	{
		if (room[j].state == 0)
		{
			if (k % 10 == 0) cout << endl;
			cout << room[j].number << '\t';
			k++;
		}
	}
	k = 0;
	cout << endl;
	cout << "下列房間有人入住：" << endl;
	for (j = 0; j < 80; j++)
	{
		if (room[j].state == 1)
		{
			if (k % 10 == 0) cout << endl;
			cout << room[j].number << '\t';
			k++;
		}
	}
	cout << endl;
}
//房間資訊初始化
void initial_room()
{
	int j, k = 101;
	for (j = 0; j < 20; j++)
	{
		room[j].number = k++;
		room[j].floor = 1;
		room[j].state = 0;
	}
	k = 201;
	for (j = 20; j < 40; j++)
	{
		room[j].number = k++;
		room[j].floor = 2;
		room[j].state = 0;
	}
	k = 301;
	for (j = 40; j < 60; j++)
	{
		room[j].number = k++;
		room[j].floor = 3;
		room[j].state = 0;
	}
	k = 401;
	for (j = 60; j < 80; j++)
	{
		room[j].number = k++;
		room[j].floor = 4;
		room[j].state = 0;
	}
}

// 運行程式: Ctrl + F5 或除錯 >“開始執行(不除錯)”選單
// 除錯程式: F5 或除錯 >“開始除錯”選單

// 入門使用技巧: 
//   1. 使用解決方案資源管理器視窗添加/管理檔案
//   2. 使用團隊資源管理器視窗連接到源代碼管理
//   3. 使用輸出視窗查看生成輸出和其他訊息
//   4. 使用錯誤串列視窗查看錯誤
//   5. 轉到“專案”>“添加新項”以創建新的代碼檔案，或轉到“專案”>“添加現有項”以將現有代碼檔案添加到專案
//   6. 將來，若要再次打開此專案，請轉到“檔案”>“打開”>“專案”并選擇 .sln 檔案

點擊本地除錯器

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