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Technical Discussion :: C++

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What are the rules of virtual function?

Answer:

1. Virtual functions must be members of some class.
2. They cannot be static members.
3. They are accessed by using object pointers.
4. A virtual function can be a friend of another class.
5. We cannot have virtual constructors but we can have virtual destructors.
6. If a virtual function is defined in the base class. It need not be necessarily redefined in the derived class.

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