c/c++位运算方法

char GetBit(Juint8 aimbyte, int bytenum)
{
char backbyte;
switch (bytenum)
{
case 0:
backbyte = aimbyte & 0x01;
break;
case 1:
backbyte = aimbyte & 0x02;
break;
case 2:
backbyte = aimbyte & 0x04;
break;
case 3:
backbyte = aimbyte & 0x08;
break;
case 4:
backbyte = aimbyte & 0x10;
break;
case 5:
backbyte = aimbyte & 0x20;
break;
case 6:
backbyte = aimbyte & 0x40;
break;
case 7:
backbyte = aimbyte & 0x80;
break;
default:
break;
}
return backbyte;

}