using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace calc
{
    internal class Program
    {
        static void Main(string[] args)
        {

            Console.Clear();

            Console.WriteLine("Enter First Number :");
            int firstnumber = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("Enter Second Number :");
            int secondnumber = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("1..Add");
            Console.WriteLine("2..Subtract");
            Console.WriteLine("3..Multiply");
            Console.WriteLine("4..Divide");

            int choice = Convert.ToInt32(Console.ReadLine());

            double result = 0;


            switch (choice)
            {
                case 1:
                    result = firstnumber + secondnumber;
                    break;
                case 2:
                    result = firstnumber - secondnumber;
                    break;
                case 3:
                    result = firstnumber * secondnumber;
                    break;
                case 4:
                    result = firstnumber / secondnumber;
                    break;
            }



            Console.WriteLine($"Result: {result}");
            Console.WriteLine("Press a Key");
            Console.ReadLine();

        }
    }
}