속성

class
 {
        int energy;
      
      public int Energy

        {

            get

            {

                return energy;

            }

           
            set

            {

                if (AvailEnergy(value))

                {

                    energy = value;

                }               

            }

private bool AvailEnergy(int value)

        {

            return (min_energy <= value) && (value <= max_energy);

        }

   }