static void Main(string[] args)
{
Mammal mammal = new Mammal();
mammal.Name = "포유류";
mammal.Nurse();
Dog ppoppi = new Dog();
ppoppi.Name = "뽀삐";
ppoppi.Nurse();
ppoppi.Bark();
Cat chichi = new Cat();
chichi.Name = "치치";
chichi.Meow();
if (ppoppi is Mammal) //true
{
Console.WriteLine("형변환을 할 수 있습니다");
Mammal mammal1 = ppoppi as Mammal; //참조형식은 as를 써서 형변환
mammal1.Nurse();
//mammal1.Bark(); //안됨
}
}
static void Main(string[] args)
{
Mammal mammal = new Mammal();
mammal.Name = "포유류";
mammal.Nurse();
Dog ppoppi = null; // new Dog();
/*ppoppi.Name = "뽀삐";
* ppoppi.Nurse();
* ppoppi.Bark();*/
/*Cat chichi = new Cat();
* chichi.Name = "치치";
* chichi.Nurse();
* chichi.Meow();*/
if (ppoppi is Mammal) // 뽀삐는 포유류인가????
{
// 값형식은 long = int값;
Mammal mammal1 = ppoppi; // 참조형식은 as를 써서 형변환
mammal1.Nurse();
// mammal1.Bark(); // error
}
if (mammal is Dog)
{
ppoppi = mammal as Dog;
ppoppi.Nurse();
ppoppi.Bark();
}
}