Why vptr is not static?

Question

Every class which contains one or more virtual function has a Vtable associated with it. A void pointer called vptr points to that vtable. Every object of that class contain

Answer 1

virtual method table is per class. An object contains a pointer to the run-time type vptr.

I don't think this is a requirement in the standard bust all compiles that I've worked with do it this way.

This is true even in you example.