using System;

namespace Test
{
	public delegate int BinaryOp(int x, int y);
	
	public class MyMath
	{
		public static int Add(int x, int y)
		{
			return x + y;
		}
		public static int Sub( int x, int y )
		{
			return x - y;
		}
		public static int mul( int x, int y )
		{
			return x * y;
		}
		public static int div(int x, int y)
		{
			int one = x;
			int two = y;
			int sum = 0;
			try
			{
				sum = one / two;
			}
			catch( Exception )
			{
				Console.WriteLine( "You try to divide by 0 which is impossible." );
			}
			return sum;
		}
	}
	public class Program
	{
		public static int Main()
		{
			BinaryOp bo = new BinaryOp(MyMath.Add);
			BinaryOp bo1 = new BinaryOp(MyMath.div);
			BinaryOp bo2 = new BinaryOp(MyMath.mul);
			BinaryOp bo3 = new BinaryOp(MyMath.Sub);
			Console.WriteLine( "Sum of MyMath.Add = {0}", bo( 5, 5 ) );
			Console.WriteLine( "Sum of MyMath.Div = {0}", bo1( 5, 0 ) );
			Console.WriteLine( "Sum of MyMath.Mul = {0}", bo2( 5, 3 ) );
			Console.WriteLine( "Sum of MyMath.Sub = {0}", bo3( 5, 3 ) );
			return 0;
		}
	}
}