reference to an interface

[kris]

Frank Benoit wrote:
> An interface is something like a promise. A class implementing an
> interface promises to have all these methods. Your class C2 is
> overriding the method from C1 that's all. Your two "help" methods are
> not two different one, they are the same.
> 
> C2 promises twice to implement a methods "void help();", inherants the
> one from C1 and overrides it.

That's a really good analogy/description ...