How can a derived C++ class clone itself via a base pointer?

Question

Here\'s what I\'m trying to do (this code doesn\'t work):

class Base
{
    virtual Base *clone() { return new Base(this); }
    virtual void ID() { printf(\"         


        

Answer 1

You're slicing the class in Base bp = &d; (this constructs a new base bp from the derived-ptr.)

Try Base* bp = &d; instead. (i.e. create a pointer of Base type to the Derived object.)