在看freemodbus代码，看到这个函数时：
eMBErrorCode
eMBRTUInit( UCHAR ucSlaveAddress, UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity )
{
eMBErrorCode eStatus = MB_ENOERR;
ULONG us
timerT35_50us;
( void )ucSlaveAddress;
ENTER_CRITICAL_SECTION( );
...
}
( void )ucSlaveAddress;这句话不理解了，给的参数明明是个无符号字符变量，在前边价格void是什么意思？
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