12Abstract ClassAn abstract class is a class that is designed to
be specifically used as a base classCannot create an object of an
abstract class.A class that contains at least one pure virtual
function is considered an abstract class. Classes derived from the
abstract class must implement the pure virtual function or they,
too, are abstract classes.
3Abstract classA pure virtual function can be declared by using
a pure specifier (= 0) in the declaration of a virtual member
function in the class declaration.class A {public: virtual void
fun() = 0; // pure virtual function};class B:public A{public:void
fun() // pure virtual function implimentation{.}};
