Qt中的函数如何接受来自两个地方的传递参数？

int sum(int a, int b) {
    return a + b;
}

int result = sum(3, 4); // result的值为7

class Sender : public QObject {
    Q_OBJECT

public:
    explicit Sender(QObject *parent = nullptr) : QObject(parent) {}

signals:
    void sendData(int data);
};

class Receiver : public QObject {
    Q_OBJECT

public:
    explicit Receiver(QObject *parent = nullptr) : QObject(parent) {}

public slots:
    void receiveData(int data) {
        qDebug() << "Received data:" << data;
    }
};

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);

    Sender sender;
    Receiver receiver;

    QObject::connect(&sender, &Sender::sendData, &receiver, &Receiver::receiveData);

    emit sender.sendData(42); // 发送信号，传递参数

    return app.exec();
}