everest% cat listitem.h
/* File: listitem.h

   We use this file to select which kind of
   data the list uses.
*/

#ifndef _listitem_h
#define _listitem_h

#include "intitem.h"

#endif
everest% 

everest% CC main5i.C list5.C intitem.C
main5i.C:
list5.C:
intitem.C:
everest% 
everest% a.out
<0, 1, 2, 3, 4>
everest%