I've got an interface class, CInterface, with a method virtual bool IsEqual (CInterface* pOp2);<BR><BR>What I want is to be able to test equality of any two objects derived from CInterface.

Hi,<BR><BR>I have a base class whose destructor is pure virtual, so the class is abstract.<BR><BR>I have a derived class (subtype) whose multi-argument constructor wants to call the base class's ...