using System;

public class Program

{

    public static void Main()

    {

        float a,b;

        int ch;

        Console.WriteLine("Enter two number");

        a=float.Parse(Console.ReadLine());

        b=float.Parse(Console.ReadLine());

        do

        {

            Console.WriteLine("***Enter your choice***");

            Console.WriteLine("For Addition press 1");

            Console.WriteLine("For Subtraction press 2");

            Console.WriteLine("For Multiplication press 3");

            Console.WriteLine("For Division press 4");

            int c;

        Console.WriteLine("Enter no");

        c=int.Parse(Console.ReadLine());

            switch(c)

            {

                case 1:

                    Console.WriteLine("Addition:" +(a+b));

                    break;

                case 2:

                    Console.WriteLine("Subtraction:" +(a-b));

                    break;

                case 3:

                    Console.WriteLine("Multiplication:" +(a*b));

                    break;

                case 4:

                    Console.WriteLine("Division:" +(a/b));

                    break;

                default:

                    Console.WriteLine("Enter a proper choice");

                    break;

            }

            Console.WriteLine("\n\n\n");

            Console.WriteLine("Do you want to continue???");

            Console.WriteLine("For Yes Press 1 and For No Press 2");

            ch=int.Parse(Console.ReadLine());

        }

        while(ch!=2);

        Console.ReadLine();

    }

}