From: Ngai Chiu Wong <ncw2@duke.edu>
  To  : 
  Date: Sat, 6 Mar 1999 23:53:17 -0500

circular include problem

This is kind of related to the circular declaration problem we talked 
about in the beginning of the semester

I have classes A and B with their declaration in A.h and B.h and their 
implementation in A.cc and B.cc. There are also B's subclasses in B.h and 
B.cc.

In A.h, I have B as a private variable. In A.cc, I call B's function.

In B.h, I have A as private variable for B and its subclasses. In B.cc, I 
call A's function in B's subclasses.


I tried to put the pre-declaration
class A
above B's declaration in B.h and it didn't work.

I tried to put the pre-declaration
class B
above A's declaration in A.h and it didn't work.

The reason for failure in both case is, I have to know what functions 
do the pre-declared class provide.

What should I do?

john wong.