using System;

namespace triangles
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Welcome to the triangular classifier, please use . for decimals");
            double a = promtForSide("Enter a value for side 1");
            double b = promtForSide("Enter a value for side 2");
            double c = promtForSide("Enter a value for side 3");
            Console.WriteLine(TriangleClassifier.determinteType(a, b, c));
            string value = Console.ReadLine();

        }
        private static double promtForSide(string message)
        {
            Console.WriteLine(message);
            string value = Console.ReadLine();
            if(Double.TryParse(value, out double result) && result > 0)
            {
                Console.WriteLine(result);
                return result;
            }
            else
            {
                return promtForSide("Please enter a positive number");
            }

        }
    }
}
using System;
using System.Collections.Generic;
using System.Text;

namespace triangles
{
    public enum TriangleType
    {
        Equilateral,
        isosceles,
        Scalene
    }
    class TriangleClassifier
    {
        public static TriangleType determinteType(double a, double b, double c)
        {
            if (a == b && b == c)
            {
                return TriangleType.Equilateral;
            }
            else if (a == b || a == c || b == c)
            {
                return TriangleType.isosceles;
            }
            else
            {
                return TriangleType.Scalene;
            }
        }
    }
}