#include <QApplication>
In my one it is:
#include <QtGui/QApplication>
by default. First: what is the difference?
hi,
both are referring to the same file only. u can use any of them.
First one simply includes the QApplication.
The second one's meaning is:
There are many modules in QtGui. you are only loading the QtGui's QApplication module.
press f2 in QApplication word u will see this #include "qapplication.h" again press f2 in qapplication.h, u will get the exact header file location

hope it helps