所谓旋转就是一端的位数移出字长后又插入到还有一端中

unsigned char RoL(unsigned char c,int b){	int tmp;	for(int i=0;i
     
      >= 1;		c |= (tmp << (sizeof(c)*8-1));	} return c;}void  main(){ 	unsigned char a=5;	int b=RoL(a,2);  //10100	int c=RoR(a,2);  //01000001         00000101}