switch语句

void A_LedOnWihch(uint8_t s)
{
    s = MAX(1, MIN(s,3));

    switch (s)
    {
        case 1:
        {
            SetLed1ROff();
            SetLed1BOn();
            SetLed2Off();
            SetLed3Off();
        }
        break;
        case 2:
        {
            SetLed1ROff();
            SetLed1BOn();
            SetLed2On();
            SetLed3Off();
        }
        break;
        case 3:
        {
            SetLed1ROff();
            SetLed1BOn();
            SetLed2On();
            SetLed3On();
        }
        break;
        default:break;
    }
}

 s = MAX(1, MIN(s,3));