error: QtGui/QApplication: No such file or directory

[MikeCyber]

Hi
it worked on 12.04 but in 13.04 i get:
main.cpp:3: error: QtGui/QApplication: No such file or directory

What am I missing? Many thanks

[spjackson]

Are you trying to use Qt 4 or 5?
Are you trying to use a repository development package for the libqt library or have you installed it via another means?
How are you trying to build e.g. qmake+make or QtCreator or what?

[MikeCyber]

setting default to qt4 did help.