Qt: Signals and slots Error: undefined reference to `vtable for

Question

Following example from this link: http://developer.kde.org/documentation/books/kde-2.0-development/ch03lev1sec3.html

#include 
#include 

        

Answer 1

Just Change your Main() as follows:

#include 

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MyWindow w;

    w.show();

    return a.exec();
}