Class List

Here are the classes, structs, unions and interfaces with brief descriptions:

CAbstractAnimal	Abstract base class combining shared state, a concrete default method, and a pure virtual method subclasses must implement
CAnimal	Base class exposing a virtual speak() method
CCat	Animal subclass that overrides speak() to meow
CDog	Animal subclass that overrides speak() to bark
CDogWithDefault	Concrete AbstractAnimal that implements the required speak() method
CInterfaceCat	ISpeaker implementation that meows
CInterfaceDog	ISpeaker implementation that barks
CISingleSpeaker	Interface contract for a single, non-substitutable speaker
CISpeaker	Pure abstract class acting as an interface contract
CPureBreedDog	Sealed 'final' class ensures NO other subclass can modify this method path