/*
 * Type: bool
 * ----------
 * This type has two values, FALSE and TRUE, which are equal to 0
 * and 1, respectively.  Most of the advantage of defining this type
 * comes from readability because it allows the programmer to
 * provide documentation that a variable will take on only one of
 * these two values.  Designing a portable representation, however,
 * is surprisingly hard, because many libraries and some compilers
 * define these names.  The definitions are usually compatible but
 * may still be flagged as errors.
 */

#ifdef THINK_C
   typedef int bool;
#else
#  ifdef TRUE
#    ifndef bool
#      define bool int
#    endif
#  else
#    ifdef bool
#      define FALSE 0
#      define TRUE 1
#    else
       typedef enum {FALSE, TRUE} bool;
#    endif
#  endif
#endif

#ifndef __cplusplus
#undef false
#undef true
#undef bool
#define false 0
#define true !false
typedef int bool;
#endif

#ifndef __cplusplus
#undef false
#undef true
#undef bool
enum bool{ false, true = !false };
#endif