/* booldef.h  - defines a "boolean" type  */
  #ifndef BOOLDEF_HEADER
  #define BOOLDEF_HEADER
  
  #define boolean int
  #define T 1
  #define F 0
  /* (K&R p. 38 equates non-zero with true,but most C's use 0 and 1.)  */
  
  #endif
  
  extern char *bool_print(boolean x);
  
  /* end of booldef.h */