/*----------------------------------------------------------

  Elizabeth Sklar
  MC140.0X
  27 September 2000

  This program prints out truth tables.

----------------------------------------------------------*/

#include <stdio.h>

// define constants
#define TRUE  1
#define FALSE 0


/*--------------------------------------------------------*/
/* printTruth                                             */
/*                                                        */
/*--------------------------------------------------------*/
char *printTruth ( int v ) {

  if ( v ) {
    return( "TRUE" );
  }
  else {
    return( "FALSE" );
  }

} /* end of printTruth() */


/*--------------------------------------------------------*/
/* main program                                           */
/*                                                        */
/*--------------------------------------------------------*/
void main() {

  printf( "truth table for AND:\n" );
  printf( "TRUE  AND TRUE  = %s\n",printTruth( (TRUE && TRUE) ));
  printf( "TRUE  AND FALSE = %s\n",printTruth( (TRUE && FALSE) ));
  printf( "FALSE AND TRUE  = %s\n",printTruth( (FALSE && TRUE) ));
  printf( "FALSE AND FALSE = %s\n",printTruth( (FALSE && FALSE) ));

  printf( "\n\ntruth table for OR:\n" );
  printf( "TRUE  OR TRUE  = %s\n",printTruth( (TRUE || TRUE) ));
  printf( "TRUE  OR FALSE = %s\n",printTruth( (TRUE || FALSE) ));
  printf( "FALSE OR TRUE  = %s\n",printTruth( (FALSE || TRUE) ));
  printf( "FALSE OR FALSE = %s\n",printTruth( (FALSE || FALSE) ));

} /* end of main() */