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What is an abstract class in c++?

In C++ an abstract class is a class that is designed to be specifically used as a base class. This class is declared using “abstract” keyword. An abstract class cannot be instantiated, which means you are not allowed to create an object of it.

abstract class

Purpose of an abstract class:

The purpose of an abstract class is to define some common behaviour that can be inherited by multiple subclasses, without implementing the entire class.

A class is abstract if it has at least one pure virtual function.

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