using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("This is a C# calculator");

        Console.WriteLine("Enter your first number");

        string Num1 = Console.ReadLine();

        float result = Int32.Parse(Num1);

        Console.WriteLine("Enter your second number");

        string Num2 = Console.ReadLine();

        float result2 = Int32.Parse(Num2);

        Console.WriteLine("Would you like to...");

        Console.WriteLine("a Add");

        Console.WriteLine("s Subtract");

        Console.WriteLine("m Multiply");

        Console.WriteLine("d Divide");

        Console.WriteLine("Your answer is...");

        switch (Console.ReadLine())

        {

            case "a":

        Console.WriteLine(result + result2);

        break;

            case "s":

        Console.WriteLine(result - result2);

        break;

            case "m":

        Console.WriteLine(result * result2);

        break;

            case "d":

        Console.WriteLine(result / result2);

        break;

        }

    }    

}