Error : 'QtGui/QMainWindow': No such file or directory : Qt 5.1.1
qt5.1, windows
Solution
You may have another option.
You can also add `widgets` in your `.pro` file like
`greaterThan(QT_MAJOR_VERSION, 4): QT += widgets`
By adding this line in `.pro` file, Now you just no need to worry about Qt version and include file like `<QtGui/QMainWindow>` or `<QtWidgets/QMainWindow>`
Hope it will useful to you.
Problem
I have installed the `Qt5.1.1` and create a new Gui Application. The code in mainwindow.h shows: ``` #if QT_VERSION >= 0x050000 #include <QtWidgets/QMainWindow> #else #include <QtGui/QMainWindow> #endif ``` I think it is fine. But when I run it, I have this: ``` error: C1083: Cannot open include file: 'QtGui/QMainWindow': No such file or directory ``` I know when I replace ``` #if QT_VERSION >= 0x050000 #include <QtWidgets/QMainWindow> #else #include <QtGui/QMainWindow> #endif ``` to ``` #include <QtWidgets/QMainWindow> ``` it works. I just wonder why the default code is wrong and how to make the defauly code right.