Task 6.2

    class Program
    {
        static void Main(string[] args)
        {
            const string ShowCommandsCommand = "showCommands";
            const string TopUpBalanceCommand = "topUpBalance";
            const string OrderFoodCommand = "orderFood";
            const string CheckBalanceCommand = "checkBalance";
            const string ChangePassword = "changePassword";
            const string ClearConsoleCommand = "clearConsole";
            const string ExitCommand = "exit";

            string showCommands = "Показывает все доступные команды.";
            string topUpBalance = "Пополняет баланс пользователя.";
            string orderFood = "Заказывает доставку еды.";
            string checkBalance = "Выводит информацию о балансе пользователя.";
            string changePassword = "Меняет пароль пользователя.";
            string clearConsole = "Очищает консоль.";
            string exit = "Выход из программы";
            string textCommands = "Команды!!\n" +
                $"{ShowCommandsCommand} -  {showCommands}\n" +
                $"{TopUpBalanceCommand} -  {topUpBalance}\n" +
                $"{OrderFoodCommand} -  {orderFood}\n" +
                $"{CheckBalanceCommand} -  {checkBalance}\n" +
                $"{ChangePassword} -  {changePassword}\n" +
                $"{ClearConsoleCommand} -  {clearConsole}\n" +
                $"{ExitCommand} -  {exit}";
            string userInput = "";
            int balance = 100;
            string password = "qwerty";
            int priceDelivery = 20;
            bool isRunning = true;

            Console.WriteLine(textCommands);

            while (isRunning == true)
            {
                Console.WriteLine("Введите команду: ");
                userInput = Console.ReadLine();

                switch (userInput)
                {
                    case ShowCommandsCommand:
                        Console.WriteLine(textCommands);
                        break;

                    case TopUpBalanceCommand:
                        Console.WriteLine("Введите сумму");
                        balance += Convert.ToInt32(Console.ReadLine());

                        Console.WriteLine("Успешное пополние!!");
                        break;

                    case OrderFoodCommand:
                        Console.WriteLine($"Ваш курьер в пути. ( - {priceDelivery}$)");

                        balance -= priceDelivery;
                        break;

                    case CheckBalanceCommand:
                        Console.WriteLine($"Ваш баланc - {balance}$");
                        break;

                    case ChangePassword:
                        userInput = Console.ReadLine();

                        if (userInput == password)
                        {
                            Console.WriteLine("Введите новый пароль");
                            password = Console.ReadLine();
                        }
                        else
                        {
                            Console.WriteLine("Неверный пароль!!");
                        }
                        break;

                    case ClearConsoleCommand:
                        Console.Clear();
                        break;

                    case ExitCommand:
                        isRunning = false;
                        break;
                }
            }
        }
    }