/*

 * Exercise:

 * Finish the ConvertSpeed method to convert speed between miles-per-hour (mph) and kilometers-per-hour (km/h).

 * - 1 mile converts to 1.609344 kilometers.

 * - Only miles-per-hour and kilometers-per-hour conversions should produce results. Other SpeedConversions should throw an Argument Exception (Speed conversion "Some_Other_Conversion" not supported).

 *

 * Expected Output:

 * 100 mph = 160.9344 km/h

 * 1.609344 km/h = 1 mph

 * 0 mph = 0 km/h

 * 0 km/h = 0 mph

 * Unhandled exception. System.ArgumentException: Speed conversion "Unknown" not supported.

 */

using System;

​

public enum SpeedConversion

{

    /// <summary>Miles-per-hour to kilometers-per-hour</summary>

    MphToKph,

​

    /// <summary>Kilometers-per-hour to miles-per-hour</summary>

    KphToMph,

​

    /// <summary>Unknown should result in an ArgumentException</summary>

    Unknown

}

​

public static class SpeedHelpers

{

    public static decimal ConvertSpeed(decimal speed, SpeedConversion conversion)

    {

        throw new NotImplementedException();

    }

}

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine($"100 mph = {SpeedHelpers.ConvertSpeed(100, SpeedConversion.MphToKph):0.#####} km/h");

        Console.WriteLine($"1.609344 km/h = {SpeedHelpers.ConvertSpeed(1.609344m, SpeedConversion.KphToMph):0.#####} mph");

        Console.WriteLine($"0 mph = {SpeedHelpers.ConvertSpeed(0, SpeedConversion.MphToKph):0.#####} km/h");

        Console.WriteLine($"0 km/h = {SpeedHelpers.ConvertSpeed(0, SpeedConversion.KphToMph):0.#####} mph");

        Console.WriteLine($"0 km/h = {SpeedHelpers.ConvertSpeed(0, SpeedConversion.Unknown):0.#####} mps");

    }

}