델리게이트

델리게이트 (p164)

namespace ConsoleApp4

{

class Program

{

delegate int CalcDelegate(int x, int y);

static int Plus(int x, int y) {

return x + y;

}

static int Minus(int x, int y) {

return x - y;

}

static void Main(string[] args)

{

CalcDelegate del1 = new CalcDelegate(Plus);

int result = del1(20, 10);

Console.WriteLine("result = {0}", result);

CalcDelegate del2 = new CalcDelegate(Minus);

result = del2(20, 10);

Console.WriteLine("result = " + result);

del1 = Minus;

result = del1(40, 20);

Console.WriteLine("result = " + result);

}

}

}

멀티 델리게이트 (p167)

namespace ConsoleApp4

{

class Program

{

delegate void CalcDelegate(int x, int y);

static void Plus(int x, int y) {

Console.WriteLine(x + y);

}

static void Minus(int x, int y) {

Console.WriteLine (x - y);

}

static void Multi(int x, int y)

{

Console.WriteLine(x * y);

}

static void Divide(int x, int y)

{

Console.WriteLine(x / y);

}

static void Main(string[] args)

{

CalcDelegate del1 = Plus;

CalcDelegate del2 = Minus;

CalcDelegate del3 = Multi;

CalcDelegate del4 = Divide;

del1 += del2;

del1 += del3;

del1 += del4;

del1(20, 10);

del1 -= del3;

del1 -= del4;

del1(20, 10);

}

}

}