1double 2u2d (unsigned int u) 3{ 4 return u; 5} 6 7double 8i2d (signed int i) 9{ 10 return i; 11} 12 13unsigned int 14d2u (double d) 15{ 16 return d; 17} 18 19signed int 20d2i (double d) 21{ 22 return d; 23} 24 25main () 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} 33