What is virtual and pure virtual function?

Answer»

Virtual Function	Pure Virtual Function
Virtual Function has its definition HIDDEN in the Base class	They have no definition in the Base class.
The derived class can OVERRIDE the virtual function if required.	In the case of a pure virtual function, the derived class has to override it.
If the derived class fails to override then it has the option to use the virtual function of the base class	It will THROW a compilation error if it fails to override pure virtual function.

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