用C++代码写一个火车票管理系统

以下是一个简单的火车票管理系统的 C++ 代码示例：

#include <iostream>
#include <string>
#include <vector>

using namespace std;

// 火车票类
class Ticket {
public:
    Ticket(string from, string to, string date, int price, int num) {
        this->from = from;
        this->to = to;
        this->date = date;
        this->price = price;
        this->num = num;
    }

    string getFrom() const { return from; }
    string getTo() const { return to; }
    string getDate() const { return date; }
    int getPrice() const { return price; }
    int getNum() const { return num; }

private:
    string from; // 出发地
    string to; // 目的地
    string date; // 日期
    int price; // 价格
    int num; // 剩余票数
};

// 火车票管理系统类
class TicketSystem {
public:
    TicketSystem() {}

    // 添加火车票
    void addTicket(string from, string to, string date, int price, int num) {
        tickets.push_back(Ticket(from, to, date, price, num));
    }

    // 查询火车票
    void searchTicket(string from, string to, string date) {
        for (auto ticket : tickets) {
            if (ticket.getFrom() == from && ticket.getTo() == to && ticket.getDate() == date) {
                cout << "From: " << ticket.getFrom() << endl;
                cout << "To: " << ticket.getTo() << endl;
                cout << "Date: " << ticket.getDate() << endl;
                cout << "Price: " << ticket.getPrice() << endl;
                cout << "Num: " << ticket.getNum() << endl;
                return;
            }
        }
        cout << "No tickets found." << endl;
    }

    // 购买火车票
    void buyTicket(string from, string to, string date) {
        for (auto& ticket : tickets) {
            if (ticket.getFrom() == from && ticket.getTo() == to && ticket.getDate() == date) {
                if (ticket.getNum() > 0) {
                    ticket.getNum()--;
                    cout << "Ticket purchased successfully." << endl;
                    return;
                }
                else {
                    cout << "No tickets available." << endl;
                    return;
                }
            }
        }
        cout << "No tickets found." << endl;
    }

private:
    vector<Ticket> tickets; // 所有火车票
};

int main() {
    TicketSystem ts;

    ts.addTicket("Shanghai", "Beijing", "2022-01-01", 100, 10);
    ts.addTicket("Shanghai", "Guangzhou", "2022-01-01", 200, 5);

    ts.searchTicket("Shanghai", "Beijing", "2022-01-01");
    ts.buyTicket("Shanghai", "Beijing", "2022-01-01");

    ts.searchTicket("Shanghai", "Beijing", "2022-01-01");
    ts.buyTicket("Shanghai", "Beijing", "2022-01-01");

    ts.searchTicket("Shanghai", "Guangzhou", "2022-01-01");
    ts.buyTicket("Shanghai", "Guangzhou", "2022-01-01");

    ts.searchTicket("Shanghai", "Guangzhou", "2022-01-01");
    ts.buyTicket("Shanghai", "Guangzhou", "2022-01-01");

    ts.searchTicket("Shanghai", "Guangzhou", "2022-01-01");
    ts.buyTicket("Shanghai", "Guangzhou", "2022-01-01");

    return 0;
}

这个代码示例包括了火车票类 `Ticket` 和火车票管理系统类 `TicketSystem`。其中，`Ticket` 类包括了出发地、目的地、日期、价格和剩余票数等成员变量，`TicketSystem` 类包括了添加火车票、查询火车票和购买火车票等方法。在 `main` 函数中，我们可以看到如何使用这个火车票管理系统：首先添加两个火车票，然后查询和购买这些火车票。