#include <stdio.h>

int
maxf (int x, int y)
{
  return x > y ? x : y;
}

#define MAXM(X,Y) ((X) > (Y) ? (X) : (Y))

int errors = 0;

void
check3 (int a, int b, int c, int expected)
{
  int result = MAXM (MAXM (a, b), c);
  if (result != expected)
    {
      printf ("For maxf (maxf (%d, %d), %d), expected %d, got %d.\n",
              a, b, c, expected, result);
      ++errors;
    }
} // max3

int
main ()
{
  // Check various permutations
  check3 (1, 2, 3, 3);
  check3 (1, 3, 2, 3);
  check3 (2, 1, 3, 3);
  check3 (2, 3, 1, 3);
  check3 (3, 1, 2, 3);
  check3 (3, 2, 1, 3);

  return errors;
} // main