What is Pure Virtual Function? Why and when it is used ?
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Answer Posted / shakti singh
A virtual function in a base class which is equated to 0 is called a pure virtual function.The class then is called a Abstract Base Class or in general ABC.No object of such class can be instantiated.ABC in general acts as an interface and implement the general flow of algorithm.A pure virtual function must be overloaded in the derived class otherwise the compiler will throw an error.
A pure virtual function do nothing and it is not concerned with the implementation detail.
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