#include <stdio.h>
#include <stdlib.h>

void main(void)
{
unsigned value = 1;

printf("%u rotated right once is %u\n", value,
_rotr(value, 1));

value = 5;
printf("%u rotated right twice is %u\n", value,
_rotr(value, 2));

value = 65534;
printf("%u rotated left twice is %u\n", value,
_rotl(value, 2));
}

书上根本就没有 还是请教这里的高手把