public void Undo() { if (prevSpeed == CeilingFan.HIGH) { _fan.High(); } else if (prevSpeed == CeilingFan.MEDIUM) { _fan.Medium(); } else if (prevSpeed == CeilingFan.LOW) { _fan.Low(); } else if (prevSpeed == CeilingFan.OFF) { _fan.Off(); } }
public void Execute() { prevSpeed = _fan.Speed; _fan.Medium(); }