请用C++stl航空管理系统

好的，以下是一个简单的航空管理系统的实现，使用了C++的STL库：

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

using namespace std;

class Flight {
public:
    Flight(string id, string from, string to, int seats) : m_id(id), m_from(from), m_to(to), m_seats(seats) {}

    string getID() const { return m_id; }
    string getFrom() const { return m_from; }
    string getTo() const { return m_to; }
    int getSeats() const { return m_seats; }

private:
    string m_id;
    string m_from;
    string m_to;
    int m_seats;
};

class Airline {
public:
    Airline(string name) : m_name(name) {}

    string getName() const { return m_name; }
    const vector<Flight>& getFlights() const { return m_flights; }

    void addFlight(const Flight& flight) { m_flights.push_back(flight); }

private:
    string m_name;
    vector<Flight> m_flights;
};

class Airport {
public:
    void addAirline(const Airline& airline) { m_airlines.push_back(airline); }
    const vector<Airline>& getAirlines() const { return m_airlines; }

private:
    vector<Airline> m_airlines;
};

int main() {
    Airport airport;

    // 添加航空公司和航班信息
    Airline airline1("Airline 1");
    airline1.addFlight(Flight("001", "Beijing", "Shanghai", 200));
    airline1.addFlight(Flight("002", "Beijing", "Guangzhou", 150));
    airline1.addFlight(Flight("003", "Shanghai", "Guangzhou", 180));
    airline1.addFlight(Flight("004", "Shanghai", "Beijing", 200));
    airport.addAirline(airline1);

    Airline airline2("Airline 2");
    airline2.addFlight(Flight("101", "Beijing", "Shanghai", 250));
    airline2.addFlight(Flight("102", "Beijing", "Guangzhou", 200));
    airline2.addFlight(Flight("103", "Shanghai", "Guangzhou", 220));
    airline2.addFlight(Flight("104", "Shanghai", "Beijing", 250));
    airport.addAirline(airline2);

    // 查询航班信息
    string from = "Beijing";
    string to = "Guangzhou";
    for (const Airline& airline : airport.getAirlines()) {
        for (const Flight& flight : airline.getFlights()) {
            if (flight.getFrom() == from && flight.getTo() == to) {
                cout << airline.getName() << " " << flight.getID() << " " << flight.getSeats() << endl;
            }
        }
    }

    // 排序航班信息
    vector<Flight> allFlights;
    for (const Airline& airline : airport.getAirlines()) {
        allFlights.insert(allFlights.end(), airline.getFlights().begin(), airline.getFlights().end());
    }
    sort(allFlights.begin(), allFlights.end(), [](const Flight& a, const Flight& b) { return a.getSeats() < b.getSeats(); });

    for (const Flight& flight : allFlights) {
        cout << flight.getID() << " " << flight.getFrom() << " " << flight.getTo() << " " << flight.getSeats() << endl;
    }

    return 0;
}

这个系统包含三个类：Flight（航班信息）、Airline（航空公司）和Airport（机场）。一个机场可以拥有多个航空公司，每个航空公司可以有多个航班。

在这个简单的示例中，我们添加了两个航空公司，每个航空公司有四个航班。我们还演示了如何查询从北京到广州的航班信息，以及如何按航班座位数排序所有航班信息。