using System;
using System.Collections.Generic;
using System.Text;

namespace DelegatesHandling
{
    public delegate decimal Calculator(decimal num1, decimal num2);
    public delegate void Test(string str);

    class Program
    {
        Calculator claci_1;
        Calculator claci_2;
        Calculator calci;

        decimal Addition(decimal n1,decimal n2)
        {
            return n1 + n2;
        }
        
        decimal Subtraction(decimal n1, decimal n2)
        {
            return n1 - n2;
        }

        void TestMethod1(string str)
        {
            Console.WriteLine("I am in TestMethod1 "+str);
        }
        
        void TestMethod2(string str)
        {
            Console.WriteLine("I am in TestMethod2 " + str);
        }

        static void Main(string[] args)
        {

            Program pgm = new Program();
            pgm.claci_1 = new Calculator(pgm.Addition);
            pgm.claci_2 = new Calculator(pgm.Subtraction);

            pgm.calci = new Calculator(pgm.Subtraction);
            pgm.calci += new Calculator(pgm.Addition);
           
           
            decimal result = pgm.claci_1(12.23m, 344.422m);
            Console.WriteLine("Addition = "+result);

            result = pgm.claci_2(12.23m, 344.422m);
            Console.WriteLine("Subtraction = " + result);

            result = pgm.calci(12.2m,13.8m);
            Console.WriteLine("Subtraction = " + result);

            Console.ReadLine();


        }
    }
}