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$ gcc --version

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$ sudo apt-get install cmake make

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#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

class MainWindow : public QMainWindow
{
 Q_OBJECT

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

#endif // MAINWINDOW_H

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#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
}

MainWindow::~MainWindow()
{
}

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private slots:
 void onButtonClicked();

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void MainWindow::onButtonClicked()
{
 // ´¦Àí°´Å¥µã»÷ÊÂÎñ
}

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MainWindow::MainWindow(QWidget *parent)
 : QMainWindow(parent)
{
 QPushButton *button = new QPushButton("Click Me", this);
 connect(button, SIGNAL(clicked()), this, SLOT(onButtonClicked()));
}

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