I think you just need a class A; decalration at the top of the file. Jon On Mon, 24 Feb 2003, Narayanan Krishnan wrote: > Definining prototypes for functions/classes can solve this problem. > > You should be able to define a class 'prototype' right at the top for class B before definining the class A followed by definition for class B. > > > > -----Original Message----- > From: Thomas Dodd [mailto:ted@cypress.com] > Sent: Monday, February 24, 2003 10:21 AM > To: psyche-list@redhat.com; redhat-devel-list@redhat.com; > mozilla-builds@mozilla.org > Subject: C++ > > > I had a question for a C++ programmer. Thought I might find one here :) > > > I have 2 classes that need to reference each other. > > "headerA.h" > class A{ > public: > int x; > int y; > B *left; > B *right; > } > > "headerB.h" > class B{ > public: > int a; > int b; > A *parent; > char foo(); > } > > Give that top is of type A, in top.left.foo() I need to modify top.right.a > > Any ideas? I've tried passing a A* in the constructor for B, but the > compiler doesn't > realize that A is a class when I try to compile, and complains about no > type listed. > > I seams to be a circular reference since A needs B and B needs A. This > cannot be that > unusual, and has probably been solved before, I just don't know how. > > Right now moy only though is to make parent a void* and the cast it to a > A* in the > implementation of B. That removes all type checking though and I'd > rather not abuse > void pointers like that. > > -Thomas > > > > > _______________________________________________ > Redhat-devel-list mailing list > Redhat-devel-list@redhat.com > https://listman.redhat.com/mailman/listinfo/redhat-devel-list > > > > _______________________________________________ > Redhat-devel-list mailing list > Redhat-devel-list@redhat.com > https://listman.redhat.com/mailman/listinfo/redhat-devel-list > _______________________________________________ Redhat-devel-list mailing list Redhat-devel-list@redhat.com https://listman.redhat.com/mailman/listinfo/redhat-devel-list
