C++ pure virtual functions related interiew questions and answers

C++ Pure Virtual Function.

What is a Pure Virtual Function?

- It is a virtual function that does not have any implementation part.
- It has only declaration part.
- It is declared by assigning the '0' in the declaration part.

class A
       virtual void pureVirtual() = 0;   // Pure Virtual Function
          // There is no function body

- This function is also known as, pure specifier.
- The "= 0" notation indicates that the virtual function is a pure virtual function and it has no function body or definition.
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Pure virtual function
BhuraRam 12-4-2015