VS2015 MFC 编写 常见的CRC校验，CRC4,CRC5,CRC8,CRC16,CRC32等

CRC4-ITUX4+X+1CRC5-EPCX4+X3+1CRC5-ITUX5+X4+X2+1CRC5-USBX5+X2+1CRC6-ITUX5+X2+1CRC7-MMCX7+X3+1CRC8X8+X2+X+1CRC8-ITUX8+X2+X+1CRC8-ROCHX8+X2+X+1CRC8-MAXIMX8+X5+X4+1CRC16-IBMX16+X15+X2+1CRC16-MAXIMX16+X15+X2+1CRC16-USBX16+X15+X2+1CRC16-MODBUSX16+X15+X2+1CRC16-CCITTX16+X12+X5+1CRC16-CCITT-FALSEX16+X12+X5+1C