/*
 *	truthtable.c
 *	Douglas L. Jones
 *	University of Illinois at Urbana-Champaign
 *	September 19, 2012
 *
 *	(c) 2012 by Douglas L. Jones
 *	This work is made available according to the Creative Commons "Attribution" license
 *	http://creativecommons.org/licenses/by/3.0/
 *
 *  truthtable.c: Computes and prints the truthtable for a 3-input logic function
 */
#include <stdio.h>

/* Define constants */

int main()
{
   /*********************/
   /* Declare variables */
   /*********************/
   int a,b,c;	/* counters for the input logic values */
   int result;

   /*************************************/
   /* Compute and print the truth table */
   /*************************************/
   printf("  A  B  C | OUT \n");	/* print truth table header */
   printf("----------|-----\n");

   /* cycle through all input bit combinations */
   for ( a = 0; a <= 1; a = a + 1 )	
   {
      for ( b = 0; b <= 1; b = b + 1 )	
      {
         for ( c = 0; c <= 1; c = c + 1 )	
         {
            result = a & b & c;		/* compute desired logical operation */

            printf("  %d  %d  %d |  %d  \n", a, b, c, result);
         }
      }
   }

   return 0;
}