Beispiel #1
0
        public string Undo()
        {
            if (_prevSpeed.Equals(Fan.High))
            {
                _fan.SetHigh();
            }

            if (_prevSpeed.Equals(Fan.Medium))
            {
                _fan.SetMedium();
            }

            if (_prevSpeed.Equals(Fan.Low))
            {
                _fan.SetLow();
            }

            if (_prevSpeed.Equals(Fan.Off))
            {
                _fan.SetOff();
            }

            return("fan set speed error");
        }
        public string Execute()
        {
            _prevSpeed = _fan.Speed;

            return(_fan.SetOff());
        }