You should make a function a virtual function if
A) every class that is derived from this class use all the member functions from this class.
B) every class that is derived from this class needs to re-define this function.
C) that function is an operator
D) only in the derived classes

Question

Quizplus · Accepted Answer

Virtual functions are used when derived classes need to override the function with their own implementation. Therefore, if every derived class needs to redefine the function, it is appropriate to make it virtual.

You Should Make a Function a Virtual Function If