1  double
       2  u2d (unsigned int u)
       3  {
       4    return u;
       5  }
       6  
       7  double
       8  i2d (signed int i)
       9  {
      10    return i;
      11  }
      12  
      13  unsigned int
      14  d2u (double d)
      15  {
      16    return d;
      17  }
      18  
      19  signed int
      20  d2i (double d)
      21  {
      22    return d;
      23  }
      24  
      25  main ()
      26  {
      27    printf ("%lf, %lf, %lf\n", u2d (~0), u2d (1 << 31), u2d (1));
      28    printf ("%lf, %lf, %lf\n", i2d (~0), i2d (1 << 31), i2d (1));
      29  
      30    printf ("%u, %u, %u\n", d2u (u2d (~0)), d2u (u2d (1 << 31)), d2u (u2d (1)));
      31    printf ("%d, %d, %d\n", d2i (i2d (~0)), d2i (i2d (1 << 31)), d2i (i2d (1)));
      32  }