public class ExtendsImpl extends ImplIfc
ImpIfcto demonstrate the inheritance of classes. The baseclass
ImpIfcis an example of a class which implements 2 different but non-exclusive interfaces, see there. This class overrides one method:
ImplIfc.processIfcMethod(int). Follow the dynamic call (virtual) explainations and test it. It is an concept which is prevalent in Java and Object Orientation, but not so relevant in most C applications.