using System;

​

public class Program

{

    static private double hyp(double a, double b)

    {

        double a2 = a * a;

        double b2 = b * b;

        return Math.Sqrt(a2 + b2);

    }

​

    static private double lrt(double a, double c)

    {

        double a2 = a * a;

        double c2 = c * c;

        return Math.Sqrt(c2 - a2);

    }

​

    public static void Main()

    {

        string answer = "This  will quit the program";

        while (answer != "q")

        {

            start:

                Console.Clear();

            Console.WriteLine("Press 1 if you are trying to find the hypotenuse and press 2 if you are trying to find the leg");

            byte choice = byte.Parse(Console.ReadLine());

            if (choice == 1)

            {

                Console.WriteLine("Please enter the length of your first leg");

                double leg1 = double.Parse(Console.ReadLine());

                Console.WriteLine("Please enter the length of your second leg");

                double leg2 = double.Parse(Console.ReadLine());

                Console.WriteLine("The length of the hypotenuse of your right triangle is: " + hyp(leg1, leg2).ToString("##.##"));

            }

            else if (choice == 2)

            {

                Console.WriteLine("Please enter the length of your leg");

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

                Console.WriteLine("Please enter the length of your hypotenuse");

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

                Console.WriteLine("The length of the hypotenuse of your right triangle is: " + lrt(leg, hyp).ToString("##.##"));

            }

            else

            {

                Console.WriteLine("Please press 4 or 8 to decide which path you want to go on");

                goto start;

            }

​

            Console.WriteLine("Press q to quit the program or any other key to continue.");

            answer = Console.ReadLine();

        }

    }

}