Destructor as a virtual

hi.
How do you is it illegal to define virtual destructors?

It is legal.

Code:

virtual ~destr();

thanks and what about constructors?

Not only it is legal, but it is good practice to declare the destructor of a polymorphic base class as virtual so as to avoid undefined behaviour should an object of a derived class be destroyed through a base class pointer.

Originally Posted by Samson144

what about constructors?

You cannot declare constructors as virtual, but read this FAQ: What is a "virtual constructor"?

thanks thanks thanks