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

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

If your class has at least one virtual function, you should make a destructor for this class virtual. This will allow you to delete a dynamic object through a baller to a base class object. If the destructor is non-virtual, then wrong destructor will be invoked during deletion of the dynamic object. 

By:Umang
Date:2002-01-09 00:00:00

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