航空机票订票系统设计 （1）采用链式存储结构，设计每条航线所涉及的信息，如起点终点站名、航班号、飞机号、飞机周日（星期几）、乘员定额、余票量、订定票的客户名单（包括姓名、订票量、舱位等级1，2或3）等； （2）设计实现机票订票系统的查询、订票、退票等功能； （3）设计并实现人机交互友好的界面或菜单。 请写出C++完整代码

以下是一个简单的C++代码示例，演示了航空机票订票系统的设计：

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

using namespace std;

// 航班信息结构体
struct Flight {
    string start;
    string destination;
    string flightNumber;
    string aircraftNumber;
    string weekDay;
    int capacity;
    int availableSeats;
    vector<string> passengerList;
};

// 航班管理类
class FlightManagementSystem {
private:
    vector<Flight> flights;

public:
    // 添加航班
    void addFlight(Flight flight) {
        flights.push_back(flight);
    }

    // 查询航班
    void searchFlights(string start, string destination, string weekDay) {
        cout << "Available flights from " << start << " to " << destination << " on " << weekDay << ":" << endl;

        for (const auto& flight : flights) {
            if (flight.start == start && flight.destination == destination && flight.weekDay == weekDay) {
                cout << "Flight Number: " << flight.flightNumber << endl;
                cout << "Aircraft Number: " << flight.aircraftNumber << endl;
                cout << "Available Seats: " << flight.availableSeats << endl;
                cout << endl;
            }
        }
    }

    // 订票
    void bookTicket(string flightNumber, string passengerName) {
        for (auto& flight : flights) {
            if (flight.flightNumber == flightNumber && flight.availableSeats > 0) {
                flight.passengerList.push_back(passengerName);
                flight.availableSeats--;
                cout << "Ticket booked successfully!" << endl;
                return;
            }
        }

        cout << "Sorry, the flight is either full or does not exist." << endl;
    }

    // 退票
    void cancelTicket(string flightNumber, string passengerName) {
        for (auto& flight : flights) {
            if (flight.flightNumber == flightNumber) {
                for (auto it = flight.passengerList.begin(); it != flight.passengerList.end(); ++it) {
                    if (*it == passengerName) {
                        flight.passengerList.erase(it);
                        flight.availableSeats++;
                        cout << "Ticket canceled successfully!" << endl;
                        return;
                    }
                }
            }
        }

        cout << "Sorry, the ticket does not exist." << endl;
    }
};

int main() {
    FlightManagementSystem fms;

    // 添加航班信息
    Flight flight1 = {"New York", "Los Angeles", "AA123", "A123", "Monday", 100, 100, {}};
    Flight flight2 = {"Los Angeles", "New York", "AA456", "A456", "Tuesday", 120, 120, {}};
    fms.addFlight(flight1);
    fms.addFlight(flight2);

    // 查询航班
    fms.searchFlights("New York", "Los Angeles", "Monday");

    // 订票
    fms.bookTicket("AA123", "John Doe");

    // 退票
    fms.cancelTicket("AA123", "John Doe");

    return 0;
}

这只是一个简单的示例，实际的航空机票订票系统可能需要更复杂的功能和数据管理。你可以根据需求进行适当的修改和扩展。