Full error message


MyMain.cpp:6: error: request for member 'mX' in 'w', which is of non-class type 'Widget()'

Cause

Project type: Qt4 Console Application

The following code caused the error:


struct Widget{ int mX; };



int main()

{

  Widget w();

  w.mX = 3;

}

Instanciate the default-constructed class without brackets:


struct Widget{ int mX; };



int main()

{

  Widget w;

  w.mX = 3;

}

From [1]: 'The code does not declare a Widget named w, it declares a function named w that takes nothing and returns a Widget'.