using System;

​

public class MyProgram

{

    public static void Main(String[] args)

    {

        Console.WriteLine("Enter 3 real numbers.");

        double num1;

        double num2;

        double num3;

        Console.WriteLine("Number 1:");

        input(out num1);

        Console.WriteLine("Number 2:");

        input(out num2);

        Console.WriteLine("Number 3:");

        input(out num3);

        if (num1 > num2)

        {

            if (num1 > num3)

            {

                if (num2 > num3)

                {

                    Console.WriteLine("The numbers you entered in desceneding order are: " + num1 + ", " + num2 + ", " + num3);

                }

                else

                {

                    Console.WriteLine("The numbers you entered in desceneding order are: " + num1 + ", " + num3 + ", " + num2);

                }

            }

            else

            {

                Console.WriteLine("The numbers you entered in desceneding order are: " + num3 + ", " + num1 + ", " + num2);

            }

        }

        else

        {

            if (num2 > num3)

            {

                if (num1 > num3)

                {

                    Console.WriteLine("The numbers you entered in desceneding order are: " + num2 + ", " + num1 + ", " + num3);

                }

                else

                {

                    Console.WriteLine("The numbers you entered in desceneding order are: " + num2 + ", " + num3 + ", " + num1);

                }

            }

            else

            {

                Console.WriteLine("The numbers you entered in desceneding order are: " + num3 + ", " + num2 + ", " + num1);

            }

        }

    }

    // .NET can only read single characters or entire lines from the console.

    // The following functions are designed to help input specific data types.

    // 'out' is a pass-by-reference modifier in C#.

    private static void input(out double result)

    {

        while (!double.TryParse(Console.ReadLine(), out result));

    }

    private static void input(out int result)

    {

        while (!int.TryParse(Console.ReadLine(), out result));

    }

    private static void input(out Boolean result)

    {

        while (!Boolean.TryParse(Console.ReadLine(), out result));

    }

    private static void input(out string result)

    {

        result = Console.ReadLine();

    }

}

​