#include <QApplication>
#include <QPushButton>
#include <QLabel>
#include <QHBoxLayout>


int main(int argc, char **argv)

{

    QApplication app(argc, argv);



    QWidget *pMainWidget = new QWidget;

    QHBoxLayout *pBoxLayout = new QHBoxLayout;



    QLabel *pLabel = new QLabel(pMainWidget);

    pLabel->setText("Hello World!");



    QPushButton *pQuitButton = new QPushButton(pMainWidget);

    pQuitButton->setText("Quit Qt!");



    pBoxLayout->addWidget(pLabel);

    pBoxLayout->addWidget(pQuitButton);



    QSize windowSize(300,200);

    pMainWidget->resize(windowSize);

    pMainWidget->show();



    QObject::connect(pQuitButton,SIGNAL(clicked()),pMainWidget,SLOT(close()));



    return app.exec();



}