1  struct
       2  {
       3    unsigned int f1:1, f2:1, f3:3, f4:3, f5:2, f6:1, f7:1;
       4  } result = {1, 1, 7, 7, 3, 1, 1};
       5  
       6  main ()
       7  {
       8    if ((result.f3 & ~7) != 0 || (result.f4 & ~7) != 0)
       9      abort ();
      10    exit (0);
      11  }