static void Main()
{
Espresso espresso = new Espresso();
Americano americano = new Americano();
Cafelatte cafelatte = new Cafelatte();
//A클래스가 B클래스의 자식인지 비교 후 1 값 리턴
//A가 B와 같은 타입인지 비교
if (americano is Espresso)
{
Console.WriteLine("1");
}
if (americano is Cafelatte)
{
Console.WriteLine("2");
}
if (cafelatte is Espresso)
{
Console.WriteLine("3");
}
//부모객체 생성 = 자식객체를 부모객체로 만듬
Espresso a = americano as Espresso;
if (a != null)
{
Console.WriteLine("4");
}
Americano b = espresso as Americano;
if (b != null)
{
Console.WriteLine("5");
}
}
static void Main(string[] args)
{
Bevarage bevarage = new Espresso();
Console.WriteLine($"{bevarage.getDescription()} {bevarage.cost()}");
Console.WriteLine("==============");
Bevarage bevarage2 = new Espresso();
bevarage2 = new Whip(bevarage2);
bevarage2 = new Mocha(bevarage2);
Console.WriteLine($"{bevarage2.getDescription()} {bevarage2.cost()}");
Console.WriteLine("==============");
Bevarage bevarage3 = new Whip(new Mocha(new Mocha(new Espresso())));
Console.WriteLine($"{bevarage3.getDescription()} {bevarage3.cost()}");
Console.WriteLine("==============");
Console.ReadKey();
}
