What is an abstract base class?

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Rajesh N V

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An abstract class is a class that is designed to be specifically used as a base class.
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An abstract class is a class that is designed to be specifically used as a base class. An abstract class contains at least one pure virtual function. You declare a pure virtual function by using a pure specifier (= 0) in the declaration of a virtual member function in the class declaration.
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Maths and Technology Lover.

Abstract base class is a class which have at least one pure virtual function i.e. fiction having declaration as =0 . And we can't create objects of such a class. This class can only be used for inheritance purposes.
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