结合qt和C++面向对象的代码

好的，下面是一个简单的结合Qt和C++面向对象的航班订票系统的示例代码：

flight.h

#ifndef FLIGHT_H
#define FLIGHT_H

#include <QString>

class Flight
{
public:
    Flight(QString flightNumber, QString departureCity, QString arrivalCity, int availableSeats);

    QString getFlightNumber();
    QString getDepartureCity();
    QString getArrivalCity();
    int getAvailableSeats();
    void reserveSeat();
    void releaseSeat();

private:
    QString m_flightNumber;
    QString m_departureCity;
    QString m_arrivalCity;
    int m_availableSeats;
};

#endif // FLIGHT_H

flight.cpp

#include "flight.h"

Flight::Flight(QString flightNumber, QString departureCity, QString arrivalCity, int availableSeats)
    : m_flightNumber(flightNumber), m_departureCity(departureCity), m_arrivalCity(arrivalCity), m_availableSeats(availableSeats)
{
}

QString Flight::getFlightNumber()
{
    return m_flightNumber;
}

QString Flight::getDepartureCity()
{
    return m_departureCity;
}

QString Flight::getArrivalCity()
{
    return m_arrivalCity;
}

int Flight::getAvailableSeats()
{
    return m_availableSeats;
}

void Flight::reserveSeat()
{
    if (m_availableSeats > 0) {
        m_availableSeats--;
    }
}

void Flight::releaseSeat()
{
    m_availableSeats++;
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QListWidgetItem>
#include "flight.h"

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void on_flightListWidget_itemClicked(QListWidgetItem *item);
    void on_reserveButton_clicked();
    void on_releaseButton_clicked();

private:
    Ui::MainWindow *ui;
    QList<Flight*> m_flights;
    Flight* m_selectedFlight;
};

#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    // Create some sample flights
    m_flights.append(new Flight("ABC123", "New York", "Los Angeles", 50));
    m_flights.append(new Flight("DEF456", "Chicago", "Houston", 75));
    m_flights.append(new Flight("GHI789", "San Francisco", "Seattle", 100));

    // Populate the flight list widget
    foreach (Flight* flight, m_flights) {
        ui->flightListWidget->addItem(flight->getFlightNumber());
    }
}

MainWindow::~MainWindow()
{
    delete ui;

    // Delete the flights
    foreach (Flight* flight, m_flights) {
        delete flight;
    }
}

void MainWindow::on_flightListWidget_itemClicked(QListWidgetItem *item)
{
    // Get the selected flight
    QString flightNumber = item->text();
    foreach (Flight* flight, m_flights) {
        if (flight->getFlightNumber() == flightNumber) {
            m_selectedFlight = flight;
            break;
        }
    }

    // Update the available seats label
    ui->availableSeatsLabel->setText(QString::number(m_selectedFlight->getAvailableSeats()));
}

void MainWindow::on_reserveButton_clicked()
{
    // Reserve a seat for the selected flight
    m_selectedFlight->reserveSeat();

    // Update the available seats label
    ui->availableSeatsLabel->setText(QString::number(m_selectedFlight->getAvailableSeats()));
}

void MainWindow::on_releaseButton_clicked()
{
    // Release a seat for the selected flight
    m_selectedFlight->releaseSeat();

    // Update the available seats label
    ui->availableSeatsLabel->setText(QString::number(m_selectedFlight->getAvailableSeats()));
}

这个示例代码演示了如何用Qt实现一个简单的航班订票系统，其中使用了C++面向对象编程的一些基本概念，例如类和对象、构造函数和析构函数、公有和私有成员函数、以及访问控制等。在这个示例代码中，Flight类表示一个航班，包含航班号、出发城市、到达城市和可用座位数等信息，同时提供了订票和释放座位等方法。MainWindow类表示主窗口，包含一个航班列表部件、一个选择航班的标签、一个显示可用座位数的标签、一个订票按钮和一个释放座位按钮等控件，同时也负责管理航班列表和处理用户的交互操作。