#include <QApplication>#include <QPushButton>#include <QWidget>#include <QHBoxLayout>int main(int argc, char *argv[]){    QApplication app(argc, argv);    QWidget window;    QPushButton *button1 = new QPushButton("One");    QPushButton *button2 = new QPushButton("Two");    QPushButton *button3 = new QPushButton("Three");    QPushButton *button4 = new QPushButton("Four");    QPushButton *button5 = new QPushButton("Five");    QHBoxLayout *layout = new QHBoxLayout;    layout->addWidget(button1, 1);    layout->addWidget(button2, 2);    layout->addWidget(button3, 3);    layout->addWidget(button4, 4);    layout->addWidget(button5, 5);    window.setLayout(layout);    window.setGeometry(20, 50, 700, 100);    window.show();    return app.exec();}