c语言通过宏来对数字移位，并输出移位后的结果。为什么提示错误

Question

如题所述

Answer 1

#include <stdio.h>
#define ROTATE_LEFT(x, s, n) ((x) << (n)) | ((x) >> ((s) - (n)))
#define ROTATE_RIGHT(x, s, n) ((x) >> (n)) | ((x) << ((s) - (n)))
int main()
{
unsigned int a;
scanf("%x", &a);
printf("%08x\n", a);
printf("%08x\n", ROTATE_LEFT(a, 8 * sizeof(int), 4));
printf("%08x\n", ROTATE_RIGHT(a, 8 * sizeof(int), 8));
return 0;
}