/******************************************************/
/* Introduction to Programming                        */
/* By Dr. ANTF                                        */
/* www.antf.net                                       */
/* Copyright 2015                                     */
/*                                                    */
/* C# 208 - Problem 5: Temperature Convertor (a)      */
/******************************************************/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DOS
{
    class Program
    {
        static void Main(string[] args)
        {
            float temp;
            int userMenu;

            //display the unit menu
            Console.WriteLine("Please select the unit to start with: ");
            Console.WriteLine("\t\tPress (1) for C\n\t\tPress (2) for F\n\t\tPress (3) for K");
            Console.Write("Your selection: ");
            userMenu = int.Parse(Console.ReadLine());

            //read the temperature
            Console.Write("\nPlease enter the temperature: ");
            temp = float.Parse(Console.ReadLine());

            //case of C
            if(userMenu == 1)
            {
                Console.WriteLine("\n\n{0} C ---> {1:0.0000} F", temp, (temp * 9f / 5) + 32);
                Console.WriteLine("{0} C ---> {1:0.0000} K", temp, temp + 273.15);

                if (temp <= 0) Console.WriteLine("\nVery Cold");
                else if (temp <= 10) Console.WriteLine("\nCold");
                else if (temp <= 20) Console.WriteLine("\nWarm");
                else if (temp <= 30) Console.WriteLine("\nHot");
                else Console.WriteLine("\nVery Hot");
            }

            //case of F
            else if (userMenu == 2)
            {
                Console.WriteLine("\n\n{0} F ---> {1:0.0000} C", temp, (temp - 32) * 5 / 9);
                Console.WriteLine("{0} F ---> {1:0.0000} K", temp, ((temp - 32) * 5 / 9) + 273.15);

                temp = (temp - 32) * 5 / 9;

                if (temp <= 0) Console.WriteLine("\nVery Cold");
                else if (temp <= 10) Console.WriteLine("\nCold");
                else if (temp <= 20) Console.WriteLine("\nWarm");
                else if (temp <= 30) Console.WriteLine("\nHot");
                else Console.WriteLine("\nVery Hot");
            }

            //case of K
            else
            {
                Console.WriteLine("\n\n{0} K ---> {1:0.0000} C", temp, temp - 273.15);
                Console.WriteLine("{0} K ---> {1:0.0000} F", temp, ((temp - 273.15) * 9f / 5) + 32);

                temp = temp - 273.15f;

                if (temp <= 0) Console.WriteLine("\nVery Cold");
                else if (temp <= 10) Console.WriteLine("\nCold");
                else if (temp <= 20) Console.WriteLine("\nWarm");
                else if (temp <= 30) Console.WriteLine("\nHot");
                else Console.WriteLine("\nVery Hot");
            }

            Console.ReadKey();
        }
    }
}