Name 

Description 

Abstract Classes 

An abstract class is a class with at least one pure virtual function. A virtual function is specified as pure by setting it equal to zero.
An abstract class can be used only as a base class for other classes. No objects of an abstract class can be created. An abstract class cannot be used as an argument type or as a function return type. However, you can declare pointers to an abstract class. References to an abstract class are allowed, provided that a temporary object is not needed in the initialization. For example,