如何读取数字；如何将这些数字存储在变量中；如何在标签中显示这些数字；从Qt中的行编辑？

num = int(input("请输入一个整数："))
print("您输入的数字是：", num)

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入一个整数：");
        int num = scanner.nextInt();
        System.out.println("您输入的数字是：" + num);
    }
}

num = int(input("请输入一个整数："))
result = num * 2
print("计算结果：", result)

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入一个整数：");
        int num = scanner.nextInt();
        int result = num * 2;
        System.out.println("计算结果：" + result);
    }
}

from PyQt5.QtWidgets import QApplication, QLabel, QVBoxLayout, QWidget

app = QApplication([])
window = QWidget()
layout = QVBoxLayout()

num = int(input("请输入一个整数："))
label = QLabel("您输入的数字是：" + str(num))
layout.addWidget(label)

window.setLayout(layout)
window.show()
app.exec_()

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

import java.util.Scanner;

public class Main extends Application {
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入一个整数：");
        int num = scanner.nextInt();

        Label label = new Label("您输入的数字是：" + num);
        VBox root = new VBox(label);
        Scene scene = new Scene(root, 200, 100);

        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

from PyQt5.QtWidgets import QApplication, QLabel, QVBoxLayout, QWidget, QLineEdit

app = QApplication([])
window = QWidget()
layout = QVBoxLayout()

line_edit = QLineEdit()
layout.addWidget(line_edit)

button = QPushButton("获取数字")
button.clicked.connect(lambda: print("您输入的数字是：", int(line_edit.text())))
layout.addWidget(button)

window.setLayout(layout)
window.show()
app.exec_()

#include <QApplication>
#include <QVBoxLayout>
#include <QWidget>
#include <QLineEdit>
#include <QPushButton>
#include <QDebug>

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

    QWidget window;
    QVBoxLayout layout;

    QLineEdit lineEdit;
    layout.addWidget(&lineEdit);

    QPushButton button("获取数字");
    QObject::connect(&button, &QPushButton::clicked, [&lineEdit]() {
        qDebug() << "您输入的数字是：" << lineEdit.text().toInt();
    });
    layout.addWidget(&button);

    window.setLayout(&layout);
    window.show();

    return app.exec();
}