loop-11.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

static int a[199];

static void
foo ()
{
  int i;
  for (i = 198; i >= 0; i--)
    a[i] = i;
}

int
main ()
{
  int i;
  foo ();
  for (i = 0; i < 199; i++)
    if (a[i] != i)
      abort ();
  return 0;
}