0322 delegate 연습

delegate int Delelegate(int a, int b);
    class Program
    {
        static int Plus(int a, int b) 
        {
            return a + b;
        }
        static void Main(string[] args)
        {
            Delelegate pd1 = Plus;
            Delelegate pd2 = delegate (int a, int b)
            {
                return a / b;
            };

            Console.WriteLine(pd1(5, 10));
            Console.WriteLine(pd2(10, 5));
        }
    }

Delelegate pd1=Plus; 이 부분에서 델리게이트 인스턴스화

public class App
    {
        public App()
        {
            //1. 기존 메서드 지정
            Action<string> action1 = Print;
            action1("1.기본 메서드 지정 방식");

            //2. 무명 메서드 지정
            Action<string, string> action2 = delegate (string msg, string error)
          {
              Console.WriteLine(msg, error);
          };
        action2("2. 무명 메서드 지정", "Inform");
        }
        public void Print(string msg) 
        {
            Console.WriteLine(msg);
        }
    }

 

 

public class App
    {
        delegate int DelCalculate(int x, int y);
        
        public App()
        {
            DelCalculate delCalculate = new DelCalculate(Plus);
            int result = delCalculate(20, 10);
            Console.WriteLine("result: " + result);

            DelCalculate delCalculate2 = new DelCalculate(Substract);
            int result1 = delCalculate2(20, 10);
            Console.WriteLine("result: " + result1);


        }
        public int Plus(int x, int y)
        {
            return x + y;
        }
        public int Substract(int x, int y)
        {
            return x - y;
        }
    }

 

 

public class App
    {
        public delegate void DelCalculate(int x, int y);
        
        public App()
        {
            DelCalculate plus = Plus;
            DelCalculate substract = Substract;
            DelCalculate multiple = Multiple;
            DelCalculate divide = Divide;

            Callback(20, 10, plus);
            Callback(20, 10, substract);
            Callback(20, 10, multiple);
            Callback(20, 10, divide);

        }
        public void Callback(int x, int y, DelCalculate dele)
        {
            dele(x, y);
        }
        public void Plus(int x, int y) 
        {
            Console.WriteLine(x + y);
        }
        public void Substract(int x, int y)
        {
            Console.WriteLine(x - y);
        }
        public void Multiple(int x, int y)
        {
            Console.WriteLine(x * y);
        }
        public void Divide(int x, int y)
        {
            Console.WriteLine(x / y);
        }
    }

 

public delegate void OnCharaMove();
    public class Chara
    {
        public OnCharaMove OnCharaMove;
        public Chara() 
        { }
        public void Move(string name) 
        {
            this.OnCharaMove();
            Console.WriteLine("{0} 캐릭터가 이동합니다.",name);
            
        }
    }

public class App
    {
        public App()
        {
            Chara chara = new Chara();
            chara.OnCharaMove = this.OnCharaMove;
            chara.Move("홍길동");
        }
        public void OnCharaMove() 
        {
            Console.WriteLine("유저가 마우스를 클릭합니다.");
        }
    }