error: QtGui/QApplication: No such file or directory

[omardavinci]

Hi i get error with this QtGui/QApplication i cant compile Nothing i tried to use widget but it is not useful. help me?

[JKSH]

Hi @omardavinci, and welcome to the Qt Dev Net!

QtGui/QApplication

This is for Qt 4. It does not exist in Qt 5. Did you see this in a tutorial? If so, please use a newer tutorial

Anyway, you need to do 2 things:

• Change #include <QtGui/QApplication> to #include <QApplication>
• Add QT += widgets to your .pro file

[omardavinci]

@JKSH Hi thx a lot one question about tutorial you refer a video tutorial or some guide? thx again

[koahnig]

@omardavinci

There is a porting guide

[JKSH]

@omardavinci said:

@JKSH Hi thx a lot one question about tutorial you refer a video tutorial or some guide? thx again

I was not referring to a specific tutorial or guide. What I meant was this: If you saw QtGui/QApplication in a tutorial, that means the tutorial is too old so you shouldn't use it.

Here is a newer one: http://doc.qt.io/qt-5/gettingstartedqt.html