用C++设计一个航空订票系统‘

好的，以下是一个简单的航空订票系统的C++代码示例：

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

using namespace std;

// 定义航班类
class Flight {
public:
    Flight(string name, string from, string to, double price, int capacity) :
        name(name), from(from), to(to), price(price), capacity(capacity) {}

    string getName() const { return name; }
    string getFrom() const { return from; }
    string getTo() const { return to; }
    double getPrice() const { return price; }
    int getCapacity() const { return capacity; }

private:
    string name;
    string from;
    string to;
    double price;
    int capacity;
};

// 定义订票类
class Booking {
public:
    Booking(string name, string flightName, int numTickets) :
        name(name), flightName(flightName), numTickets(numTickets) {}

    string getName() const { return name; }
    string getFlightName() const { return flightName; }
    int getNumTickets() const { return numTickets; }

private:
    string name;
    string flightName;
    int numTickets;
};

// 定义系统类
class AirlineSystem {
public:
    // 添加航班
    void addFlight(Flight f) {
        flights.push_back(f);
    }

    // 订票
    bool bookFlight(Booking b) {
        // 查找对应的航班
        auto it = find_if(flights.begin(), flights.end(), [&](const Flight& f) {
            return f.getName() == b.getFlightName();
        });

        if (it == flights.end()) {
            return false;
        }

        // 检查是否有足够的座位
        if (it->getCapacity() < b.getNumTickets()) {
            return false;
        }

        // 更新座位数
        it->capacity -= b.getNumTickets();

        // 添加订单
        bookings.push_back(b);

        return true;
    }

    // 显示所有航班
    void displayFlights() const {
        for (const auto& f : flights) {
            cout << "Flight " << f.getName() << " from " << f.getFrom() <<
                " to " << f.getTo() << " price: " << f.getPrice() <<
                " capacity: " << f.getCapacity() << endl;
        }
    }

    // 显示所有订单
    void displayBookings() const {
        for (const auto& b : bookings) {
            cout << "Booking for " << b.getName() << " on flight " <<
                b.getFlightName() << " for " << b.getNumTickets() <<
                " tickets" << endl;
        }
    }

private:
    vector<Flight> flights;
    vector<Booking> bookings;
};

int main() {
    // 创建系统
    AirlineSystem system;

    // 添加航班
    system.addFlight(Flight("AA123", "New York", "Los Angeles", 200, 100));
    system.addFlight(Flight("UA456", "Chicago", "San Francisco", 300, 50));
    system.addFlight(Flight("DL789", "Boston", "Miami", 150, 200));

    // 显示所有航班
    system.displayFlights();

    // 订票
    Booking b1("John", "AA123", 2);
    Booking b2("Mary", "DL789", 1);
    Booking b3("Tom", "UA456", 3);

    bool success1 = system.bookFlight(b1);
    bool success2 = system.bookFlight(b2);
    bool success3 = system.bookFlight(b3);

    if (success1 && success2 && success3) {
        cout << "Bookings successful!" << endl;
    }
    else {
        cout << "Bookings failed!" << endl;
    }

    // 显示所有订单
    system.displayBookings();

    return 0;
}

该系统使用三个类表示航班、订票和整个系统，利用向量存储所有航班和订单。可以使用 `addFlight` 添加航班，使用 `bookFlight` 订票，使用 `displayFlights` 和 `displayBookings` 显示所有航班和订单。