static void Main(string[] args)
{
var square = new Square(10);
var adapter = new SquareToRectangleAdapter(square);
IRectangle adaptedSquare = adapter;
Console.WriteLine(adaptedSquare.Area());
}
public static void Main()
{
Shape s = new Shape();
// s.Area(10, 10); // error - ambiguous !!!
// s.IRectangle.Area(10, 10); // error
// s.ITriangle.Area(10, 10); // error
((IRectangle)s).Area(20, 20); // 캐스팅-업
((ITriangle)s).Area(20, 20); // 캐스팅-업
IRectangle r = s; // 인터페이스로 캐스팅-업
ITriangle t = s; // 인터페이스로 캐스팅-업
r.Area(30, 30);
t.Area(30, 30);
}
static void Main(string[] args)
{
IRectangle rect1 = ShapeFactory.GetInstance("Rectangle", 3, 4) as IRectangle;
Console.WriteLine($"The area is {rect1.Area()}");
IRectangle rect2 = ShapeFactory.GetInstance("Rectangle") as IRectangle;
// "as" - type cast without exceptions
// ICircle circ1 = new Circle(1.5);
// ICircle circ2 = new Circle();
ISquare sq = ShapeFactory.GetInstance("Square", 3) as ISquare;
//IRectangle ir = new NewRectangle();
IShape[] arr = { rect1, rect2, sq };
arr.ToList().ForEach(Console.WriteLine);
}