C / C++ / MFC

class animal()
{
   OpenMouth() ;
   breath_in();
   breath_out();
}
class cat() : public animal
{ 
   play_with_wool();
}
class dog() : public animal
{
   hunt_cats();
}
class mops1() : public dog
{ 
   get_fat_and_fart()
}
class mops2() : public dog
{ 
   get_fat()
}
class greyhound1() : public dog 
{
  run()
}
class specialdog() : public dog
{
  run_fast()
}

barf() { breath_in(); OpenMouth(); dosomething(); }

class greyhound1() : public dog 
{
  run()
  barf(); // added ... 
}
class specialdog() : public dog
{
  run_fast()
  barf(); // added ... 
}
class greywolf() : public wolf
{ 
   barf(); // added
}