using System;

​

public class Program

{

    static private double leg(double c, double a)

    {

        double a2 = a * a;

        double c2 = c * c;

        return Math.Sqrt(c2 - a2);

    }

​

    static private double hyp(double a, double b)

    {

        double a2 = a * a;

        double b2 = b * b;

        return Math.Sqrt(a2 + b2);

    }

​

    public static void Main()

    {

        start:

        {

            Console.WriteLine("If you would like to find the hypotenuse, press 2, if you would like to find the missing leg, press 1.");

            string choice = Console.ReadLine();

            if (choice == "1")

            {

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

                double input1 = double.Parse(Console.ReadLine());

                Console.WriteLine("Please enter the hypotnuse");

                double input2 = double.Parse(Console.ReadLine());

                double output = leg(input2, input1);

                Console.WriteLine("The missing leg is: " + output);

            }

            else if (choice == "2")

            {

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

                double input1 = double.Parse(Console.ReadLine());

                double input2 = double.Parse(Console.ReadLine());

                double output = hyp(input1, input2);

                Console.WriteLine("The hypotenuse is: " + output);

            }

​

            {

                Console.WriteLine("Would you like to run the program again? y/n");

                string choice1 = Console.ReadLine();

                if (choice1 == "y" || choice1 == "Y")

                {

                    Console.Clear();

                    goto start;

                }

            }

        }

    }

}