/***********************************************************************   (C) Copyright, 1990 by Dean Rubine, Carnegie Mellon University    Permission to use this code for noncommercial purposes is hereby granted.    Permission to copy and distribute this code is hereby granted provided    this copyright notice is retained.  All other rights reserved. **********************************************************************/extern char _zdebug_flag[];#define Z(f) if(_zdebug_flag['f'] > 0)#define ZZ(f) if(_zdebug_flag['f'] >= 2)#define ZZZ(f) if(_zdebug_flag['f'] >= 3)#define ZZZZ(f) if(_zdebug_flag['f'] >= 4)extern double kludge[];