/* Print a table of values for some boolean functions. */

#include <stdio.h>

char bool (int i);

int main(void)
{
   int   b1, b2, b3, b4;       /* boolean variables */
   int   cnt = 0;

   /*headings*/
   printf("\n%5s%5s%5s%5s%5s%7s%7s\n\n",
      "Cnt", "b1", "b2", "b3", "b4",
      "fct1", "fct2");

   for (b1 = 0; b1 <= 1; ++b1)
      for (b2 = 0; b2 <= 1; ++b2)
         for (b3 = 0; b3 <= 1; ++b3)
            for (b4 = 0; b4 <= 1; ++b4)
              printf("%5d%5c%5c%5c%5c%7c%7c\n",
                     ++cnt, bool(b1), bool(b2), bool(b3), bool(b4),
                     bool(b1 || b2 || b3 || b4),
                     bool(!(!b1 || b2) && (!b3 || b4))
                    );
   printf("\n");
   return 0;
}

char bool (int i){
  if (i==0) return 'F'; else return 'T';
}