Qt Hello World
//master header for a Gui
#include <QtGui>
 
//main function
int main(int argc, char *argv[])
{
    //app is an object that governs the application
    //make sure everything is initialized correctly
    QApplication app(argc, argv);
 
    //QPushButton is a widget
    //the text of the button is Hello World
    QPushButton *button = new QPushButton("Hello World");
    //show the button
    button->show();
 
    return app.exec();
}

To compile:
cd helloWorld
qmake
make
./helloworld

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