C/C++語言如何實現位元組高低位互換

資料來源: https://mp.weixin.qq.com/s/vTTyPdvZa0ngeve5s151dQ

Code

unsigned char shift_fun1(unsigned char data)  
{  
    unsigned char i;  
    unsigned char tmp=0x00;  
 
    for(i=0;i<8;i++)  
    {  
         tmp=((data>>i)&0x01)|tmp;  
         if(i<7)  
            tmp=tmp<<1;  
    }  
    printf("  after shift fun1 data=%x \n",tmp);  

    return tmp;  
}


unsigned char shift_fun2(unsigned char data)  
{  
    data=(data<<4)|(data>>4);  
    data=((data<<2)&0xcc)|((data>>2)&0x33);  
    data=((data<<1)&0xaa)|((data>>1)&0x55);  
    printf("  after shift fun2 data=%x \n",data);  

    return data;  
}