static void Main(string[] args)
        {
            CoffeePowder  coffee      = new CoffeePowder(100);
            WaterGalon    water       = new WaterGalon(1000);
            CoffeeMilk    milk        = new CoffeeMilk(400);
            CoffeeMachine yummyCoffee = new CoffeeMachine(coffee, water, milk);

            Console.WriteLine("The Coffee Machine!");
            Console.WriteLine("Pilihan : ");
            Console.WriteLine("A. Espresso");
            Console.WriteLine("B. Cappucino");
            Console.WriteLine("Pilihan Salah Satu : ");

            char order = char.Parse(Console.ReadLine());

            if (order == 'a')
            {
                Console.WriteLine("\ncheck " + yummyCoffee.checkAvailability());
                String result = yummyCoffee.makeEsspresso();
                Console.WriteLine("result " + result);
            }

            if (order == 'b')
            {
                Console.WriteLine("\ncheck " + yummyCoffee.checkAvailability());
                String result = yummyCoffee.makeCappucino();
                Console.WriteLine("result " + result);
            }

            Console.WriteLine("check " + yummyCoffee.checkAvailability());
        }
 public CoffeeMachine(CoffeePowder powder, WaterGalon galon, CoffeeMilk milk)
 {
     this.WaterGalon   = galon;
     this.CoffeePowder = powder;
     this.CoffeeMilk   = milk;
 }