FuelGauge

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

namespace A5
{
    class FuelGauge
    {

        private static double fuel = 0;

        public static double getFuel()
        {
            return fuel;
        }
        public static void setFuel()
        {
            bool invalid = true;
            double n = 0;

            while (invalid)
            {
                try
                {
                    Console.WriteLine("How much fuel do you want to add?");
                    n = int.Parse(Console.ReadLine());

                    double total = fuel + n;

                    if (total > 60)
                    {
                        fuel = 60;
                        Console.WriteLine("Added 60L of fuel");
                        invalid = false;
                    } else if (n <= 0)
                    {
                        Console.WriteLine("You need to add more gas, 0 L is not allowed!");
                    }
                    else
                    {
                        fuel = n;
                        invalid = false;
                        Console.WriteLine("Added " + n + "L of fuel");
                    }

                } catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }
        }
        public static bool checkGas()
        {
            if (fuel >= .12)
            {
                fuel = fuel - .12;
                return true;
            }
            else
            {
                Console.WriteLine("Out of fuel... please add fuel!");
                return false;
            }
        }
    }
}