static void Main(string[] args)
{
//kansaliw ma 3 kanjiw hnaya kankatbo i kan instancemaken in delegate
CalculateDelegate del1 = new CalculateDelegate(Add);
CalculateDelegate del2 = new CalculateDelegate(Substract);
CalculateDelegate del3 = new CalculateDelegate(Multiply);
CalculateDelegate del4 = new CalculateDelegate(Divide);
//add 4 delegate to del5 which is multicast delegate
CalculateDelegate del5 = del1 + del2 + del3 + del4;
del5.Invoke(20, 5);
del5 -= del2;
Console.WriteLine("----------------------------");
Console.WriteLine();
del5.Invoke(10, 2);
Console.WriteLine("----------------------------");
del5 += del2;
del5 += del2;
del5 += del2;
del5.Invoke(6, 3);
}
//public static double Calculate(double a, double b, Operator o)
//{
// switch (o)
// {
// case Operator.Add:
// return Add(a, b);
// case Operator.Subtract:
// return Subtract(a, b);
// case Operator.Multiply:
// return Multiply(a, b);
// case Operator.Divide:
// return Divide(a, b);
// default:
// return 0;
// }
//}
/// <summary>
/// 委托替代Calculate 取消switch判断
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <param name="cd"></param>
/// <returns></returns>
public double Calculate(double a, double b, CalculateDelegate cd)
{
double result = 0;
result = cd.Invoke(a, b);
return(result);
}
//Main_12_2_5
public static void Main_12_2_5()
{
//����ί�а�
myDelegate = new CalculateDelegate(Add);
//�ص�Add����
//myDelegate(100, 200);
myDelegate.Invoke(100, 200);
myDelegate = new CalculateDelegate(Subtract);
//myDelegate(100, 200);
myDelegate.Invoke(100, 200);
}
public static void Main_12_2_5()//Main_12_2_5
{
//进行委托绑定
myDelegate = new CalculateDelegate(Add);
//回调Add方法
//myDelegate(100, 200);
myDelegate.Invoke(100, 200);
myDelegate = new CalculateDelegate(Subtract);
//myDelegate(100, 200);
myDelegate.Invoke(100, 200);
}
//Main_12_2_5
public static void Main_12_2_5()
{
//进行委托绑定
myDelegate = new CalculateDelegate(Add);
//回调Add方法
//myDelegate(100, 200);
myDelegate.Invoke(100, 200);
myDelegate = new CalculateDelegate(Subtract);
//myDelegate(100, 200);
myDelegate.Invoke(100, 200);
}
static void Main(string[] args)
{
CalculateDelegate del1 = new CalculateDelegate(Add);
CalculateDelegate del2 = new CalculateDelegate(Subtract);
CalculateDelegate del3 = new CalculateDelegate(Multiply);
CalculateDelegate del4 = new CalculateDelegate(Divide);
// add 4 delegates to del5 which is multicast delegate
CalculateDelegate del5 = del1 + del2 + del3 + del4;
del5.Invoke(20, 5);
del5 -= del2;
Console.WriteLine("--------------");
Console.WriteLine();
del5.Invoke(10, 2);
del5 += del2;
del5 += del2;
del5 += del2;
del5 += del2;
del5.Invoke(6, 3);
}
public static double Calculate(double a, double b, CalculateDelegate cd)
{
return(cd.Invoke(a, b));
}
