Derived classes in C - What is your favorite method?

Question

In my experience in object oriented C programming I have seen two ways to implement derived classes.

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First Method, have a definition of the pa

Answer 1

The first method is hideous and it hides important information. I'd never use it or allow it being used. Even using a macro would be better:

#define BODY int member1; \
             int member2; 

struct base_class
{
   BODY
};

But method 2 is much better, for reasons others have pointed out.