1  #define int unsigned
       2  
       3  struct foo
       4  {
       5    int aa : 1;
       6    int a : 9;
       7    int c : 16;
       8    int d : 6;
       9  };
      10  
      11  
      12  int
      13  foo (a, b)
      14       struct foo a;
      15  {
      16    return a.d == 0;
      17  }