ABC cont.

• One use of the ABC concept is to “enforce interface rules”.

• Since a virtual function in the Abstract Base Class must be overloaded, this can enforce the interface defined by the ABC.

• Derived Class Doesn't Use new.

  • class baseDMA
  • ...
  • class lacksDMA : public baseDMA
  • // no new call

• No need for explicit destructor, copy constructor, or assignment operator.