2b. (iv). Interfaces

Program:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace project2.b4

{

using  A = System.Console;

interface  Addtion

{

int Add();

}

interface Multiplication

{

int Mul();

}

class Computation  : Addtion, Multiplication

{

int x, y;

public Computation(int x, int y)

{

this.x = x;

this.y = y;

}

public int Add()

{

return  (x + y);

}

public int Mul()

{

return  (x * y);

}

}

class Program

{

static void Main(string[] args)

{

Computation com = new Computation(10, 20);

Addtion add = (Addtion)com;

Multiplication mul = (Multiplication)com;

A.WriteLine("Sum=" + add.Add());

A.WriteLine("product=" + mul.Mul());

A.ReadKey();

}

}

}