How do you know that your class requires virtual destructor, C/C++ Programming

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How do you know that your class requires a virtual destructor?

A: If at least your class has one virtual function, you must make a destructor for this class virtual. It will let you to delete a dynamic object by a caller to a base class object. If destructor is non-virtual, then wrong destructor shall be invoked throughout deletion of the dynamic object.

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