C / C++ / MFC

class A
{
public:
   friend ostream& operator<<(ostream& os, const A& a)
public:
   void ShowExpandedInfo() { cout<<this <<endl; }
   // other stuff
};
=================
class B : public A
{
public:
   void RunOuterLoop();
   // other stuff
};
=================
int main()
{
   A a;
   B b;
   b.RunOuterLoop();
   // etc.
   return 0;
}
==================
void B::RunOuterLoop()
{
   // other stuff
   ShowExpandedInfo();
}