930921-1.c

来自「this is a gcc file, you can download it 」· C语言 代码 · 共 16 行

f (x)
     unsigned x;
{
  return (unsigned) (((unsigned long long) x * 0xAAAAAAAB) >> 32) >> 1;
}

main ()
{
  unsigned i;

  for (i = 0; i < 10000; i++)
    if (f (i) != i / 3)
      abort ();
  exit (0);
}