#include <stdio.h>
#include <stdlib.h>

int main (int argc, char **argv) {
  int a, b, x;

  if (argc < 3) {
    printf ("USAGE: %s <a> <b>\n", argv[0]);
    exit (0);
  }

  a = atoi (argv[1]);
  b = atoi (argv[2]);
  printf ("You entered (%i, %i) for (a, b).\n", a, b);

  if (b == 0) goto ZERO;
  if (b > 0) goto POS;

 NEG:
  a = a - 1;
  b = b + 1;
  if (b == 0) goto ZERO;
  goto NEG;

 POS:
  a = a + 1;
  b = b - 1;
  if (b > 0) goto POS;

 ZERO:
  x = a;

  printf ("x = a + b\n");
  printf ("x = %i\n", x);
  return 1;
}