I'm creating a class that's supposed to be double linked but I can't get it to compile.

The code is something like this:

class Abc;
class Abc
{
 private:
  Abc previous;
  Abc next;
};

When compiling it gives me the error 'Abc undefined, size not known'. Is there any way around this?

What if you use pointers, eg Abc* previous?

Hmm, I was intending to use a pointer! Silly me! Thanks