Virtual functions | Pure Virtual Functions | Abstract Classes in C++
What is Virtual function?
What is Pure virtual function ?
What is an abstract classes?
A virtual function is a special form of member function that is declared within a base class and redefined by a derived class. The keyword virtual is used to create a virtual function, precede the function's declaration in the base class. If a class includes a virtual function and if it gets inherited, the virtual class redefines a virtual function to go with its own need.