C++ Multiple Inheritance - why you no work?

Question

I am trying to figure out an interesting multiple inheritance issue.

The grandparent is an interface class with multiple methods:

class A
{
public:
          


        

Answer 1

You need to make your base classes virtual in order for them to inherit properly. The general rule is that all non-private member functions and base classes should be virtual UNLESS you know what you're doing and want to disable normal inheritance for that member/base.