static void Main(string[] args)
{
Coffee normalCoffee = new Coffee(CoffeeSize.Normal);
Coffee doubleCoffee = new Coffee(CoffeeSize.Double);
Console.WriteLine("The {0} coffee is {1} ml.", normalCoffee.Size, (int)normalCoffee.Size);
Console.WriteLine("The {0} coffee is {1} ml.", doubleCoffee.Size, (int)doubleCoffee.Size);
Console.WriteLine("{0:f2}lv",normalCoffee.CalcPrice(normalCoffee.Size));
}
