Can't downcast because class is not polymorphic?

Question

Is it possible to have inheritance with no virtual methods? The compiler is saying that the following code is not polymorphic.

Example:

Class A(){
           


        

Answer 1

yes, dynamic_cast for non-polymorphic types are not allowed. The base class shall have at least one virtual method. Only then that class can be called as polymorphic.

This article explains a similar example: http://www.cplusplus.com/doc/tutorial/typecasting/