using System;

public class Program

{

    public static void Main()

    {

        // calculator

        //input from the user, two numbers.

        double num1 = 0;

        double num2 = 0;

        double result = 0;

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

        Console.WriteLine("Calculator Program");

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

​

        // User input 

        Console.WriteLine("Enter first Value: \t ");

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

        Console.WriteLine("Enter second Value: \t ");

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

        // Cast / convert string to doubles

        // Enter an Option 

        Console.Write("Enter An Option:");

        Console.WriteLine("+ : Add");

        Console.Write("Enter An Option:");

        Console.WriteLine("- : Subtract");

        Console.Write("Enter An Option:");

        Console.WriteLine("* : Multiple");

        Console.Write("Enter An Option:");

        Console.WriteLine("/ : Divide");

        Console.Write("Enter An Option");

        // Create a switch to read user input 

        switch(Console.ReadLine())

        {

            case "+":

                result = num1 + num2;

                Console.WriteLine($"Your Result: {num1} + {num2} = "  + result);

                break;

            case "-":

                result = num1 - num2;

                Console.WriteLine($"Your Result: {num1} - {num2}  = " + result);

                break;

            case "*":

                result = num1 * num2;

                Console.WriteLine($"Your Result: {num1} * {num2} = " + result);

                break;

            case "/":

                result = num1 / num2;

                Console.WriteLine($"Your Result: {num1} / {num2} = " + result);

                break;  

            default:

                Console.WriteLine("Enter a valid option");

                break;

        }

    }

}