using System;

​

public class Time

{

    public static void Main()

    {

        string inputHours;

        int hours;

        int firstHour;

        Console.WriteLine("Time Elapsed");

        Console.Write("Enter time in hours (0-24): ");

        inputHours = Console.ReadLine();

        if (Int32.TryParse(inputHours, out hours) == true)

        {

            if (hours <= -1)

            {

                Console.WriteLine("Input error. Please input time in hours from 0 - 24 only.");

            }

            else if (hours >= 25)

            {

                Console.WriteLine("Input error. Please input time in hours from 0 - 24 only.");

            }

            else if (hours == 24)

            {

                firstHour = (hours * 60) * 60;

                Console.WriteLine("The equivalent time in seconds is {0:#,0}.", firstHour);

            }

            else

            {

                string inputMinutes;

                int minutes;

                int hoursValue;

                int minutesValue;

                int hoursMinutesTotal;

                Console.Write("Enter time in minutes (0-60): ");

                inputMinutes = Console.ReadLine();

                if (Int32.TryParse(inputMinutes, out minutes) == true)

                {

                    if (minutes <= -1)

                    {

                        Console.WriteLine("Input error. Please input time in minutes from 0 - 60 only.");

                    }

                    else if (minutes >= 61)

                    {

                        Console.WriteLine("Input error. Please input time in minutes from 0 - 60 only.");

                    }

                    else if (hours == 23 && minutes == 60)

                    {

                        hoursValue = (hours * 60) * 60;

                        minutesValue = minutes * 60;

                        hoursMinutesTotal = hoursValue + minutesValue;

                        Console.WriteLine("The equivalent time in seconds is {0:#,0}.", hoursMinutesTotal);

                    }

                    else

                    {

                        string inputSeconds;

                        int seconds;

                        int secondsValue;

                        Console.Write("Enter time in seconds(0-60): ");

                        inputSeconds = Console.ReadLine();

                        if (Int32.TryParse(inputSeconds, out seconds) == true)

                        {

                            if (seconds <= -1)

                            {

                                Console.WriteLine("Input error. Please input time in seconds from 0 - 60 only.");

                            }

                            else if (seconds >= 61)

                            {

                                Console.WriteLine("Input error. Please input time in seconds from 0 - 60 only.");

                            }

                            else

                            {

                                hoursValue = (hours * 60) * 60;

                                minutesValue = minutes * 60;

                                secondsValue = hoursValue + minutesValue + seconds;

                                Console.WriteLine("The equivalent time in seconds is {0:#,0}.", secondsValue);

                            }

                        }

                        else

                        {

                            Console.WriteLine("Invalid input. Please input a valid value for seconds.");

                        }

                    }

                }

                else

                {

                    Console.WriteLine("Invalid input. Please input a valid value for minutes.");

                }

            }

        }

        else

        {

            Console.WriteLine("Invalid input. Please input a valid value for hours.");

        }

    }

}

​