using System;

public class Program

{

    public static void Main()

    {

        double firstNum;

        double secNum;

        double result = 0;

        string operators;

        int a = 0;

        Console.WriteLine("Enter the first number: ");

        firstNum = double.Parse(Console.ReadLine());

        Console.WriteLine("Enter the second number: ");

        secNum = double.Parse(Console.ReadLine());

        Console.WriteLine("-------------------------------------");

        Console.WriteLine("Enter the Operator: ");

        Console.WriteLine("+ (addition)");

        Console.WriteLine("- (subtraction)");

        Console.WriteLine("/ (division)");

        Console.WriteLine("* (multiplication)");

        operators= Console.ReadLine();

        if (operators == "+" ){

            a = 1;

        }

        else if (operators == "-"){

            a = 2;

        }

        else if (operators == "/"){

            a = 3;

        }

        else if (operators == "*"){

            a = 4;

        }

        else{

            Console.WriteLine("Please enter the symbol");

        }

        switch (a) {

            case 1:

                result = firstNum + secNum;

                break;

            case 2:

                result = firstNum - secNum;

                break;

            case 3:

                result = firstNum / secNum;

                break;

            case 4:

                result = firstNum * secNum;

                break;

            default:

                Console.WriteLine("Hmm? What's this? an error?");

                break;

        }       

        Console.WriteLine("--------------------------------");

        Console.WriteLine("The answer is: ");

        Console.WriteLine(result);

        Console.WriteLine("--------------------------------");

        Main();

    }

}