using System;

    public class OPERATORS

    {

    public static int num1;

    public static int num2;

    public static int operators;

​

        public static void Main(string[] args)

    {

        GetValue();

        DisplayResult();

    }

    public static void GetValue()

    {

         Console.Write("Enter first number: ");

         num1 = Convert.ToInt32(Console.ReadLine());

​

         Console.Write("Enter second number: ");

         num2 = Convert.ToInt32(Console.ReadLine());

    }

        public static int Add(int num1, int num2)

    {

        return num1 + num2;

        }

        public static int Sub(int num1, int num2)

    {

        return num1 - num2;

        }

        public static int Mul(int num1, int num2)

    {

        return num1 * num2;

        }

        public static int Div(int num1, int num2)

    {

        return num1 / num2;

        }

​

        public static void DisplayResult()

        {

            Console.WriteLine(" ");

            Console.WriteLine("Select what operator you will use");

            Console.WriteLine("choose 1 if addition(+)");

            Console.WriteLine("choose 2 if subtraction(-)");

            Console.WriteLine("choose 3 if multiplication(*)");

            Console.WriteLine("choose 4 if division(/):  ");

            operators = Convert.ToInt32(Console.ReadLine());

            if (operators == 1)

            {

                Console.WriteLine(num1 + " + " + num2 + " = " + Add(num1, num2));

                Console.WriteLine(" ");

            }

            if (operators == 2)

            {

                Console.WriteLine(num1 + " - " + num2 + " = " + Sub(num1, num2));

                Console.WriteLine(" ");

            }

            if (operators == 3)

            {

                Console.WriteLine(num1 + " * " + num2 + " = " + Mul(num1, num2));

                Console.WriteLine(" ");

            }

            if (operators == 4)

            {

                Console.WriteLine(num1 + " / " + num2 + " = " + Div(num1, num2));

                Console.WriteLine(" ");

            }

     }

}

​