static void Main(string[] args)
{
FlyingCar car = new FlyingCar();
car.Run();
car.Fly();
IRunnable runnable = car as IRunnable;
runnable.Run();
IFlyable flyable = car as IFlyable;
flyable.Fly();
}
static void Main(string[] args)
{
FlyingCar car = new FlyingCar();
car.Run();
car.Fly();
car.Company = "현대";
IRunnable runnable = car as IRunnable; //형변환, 형변환 안되면 null값 들어감
runnable.Run();
IFlyable flyable = car as IFlyable;
flyable.Fly();
}