在C语言中，我们可以使用位操作符进行左移和右移操作，但需要注意的是C语言没有直接的循环移位运算符。
以下是一个函数，它实现了二进制数字的循环左移和右移：
#include<stdio.h>
unsigned int leftRotate(unsigned int num, unsigned int rotation) {
unsigned int BITS = sizeof(num) * 8;
return (num << rotation)|(num >> (BITS - rotation));
}
unsigned int rightRotate(unsigned int num, unsigned int rotation) {
unsigned int BITS = sizeof(num) * 8;
return (num >> rotation)|(num << (BITS - rotation));
}
int main() {
unsigned int num = 15; // Binary: 00001111
unsigned int res = leftRotate(num, 2);
printf("%u", res); // Output: 60, which is 00111100 in binary
res = rightRotate(num, 2);
printf("n%u", res); // Output: 192, which is 11000000 in binary
return 0;
}这里，unsigned int BITS = sizeof(num) * 8; 用来获取num的位数，num << rotation实现左移，num >> rotation实现右移。
|(num >> (BITS - rotation)) 和 |(num << (BITS - rotation)) 用来实现“循环”，也就是将被移出的位再移回来。
发布者：luotuoemo，转转请注明出处：https://www.jintuiyun.com/173182.html
