Subclass

[wysota]

This has nothing to do with Qt.
Here is a link to a good C++ book: http://www.mindview.net/Books/TICPP/...ngInCPP2e.html

and a simple example:

class A {
public:
  virtual void methodA(){ std::cout << "Method A::A" << std::endl; }
};
class B : public class A {
public:
  void methodA(){ std::cout << "Method B::A" << std::endl; }
};

class A {
public:
  virtual void methodA(){ std::cout << "Method A::A" << std::endl; }
};
class B : public class A {
public:
  void methodA(){ std::cout << "Method B::A" << std::endl; }
};

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B is a subclass of A and reimplements a virtual method "methodA".

BTW. This is related to this thread.