int n = rdm.Next(0, sup + 1);
            int k = 0, nombreDeCoups = 0;

            Console.Write("> You have to find a number between 0 and {0}\n", sup);

            try
            {

                do
                {
                    Console.Write("> Enter your number : ");
                    k = int.Parse(Console.ReadLine());

                    if (k > sup)
                    {
                        Console.WriteLine("Enter a number between 0 and {0}...", sup);
                        break;
                    }

                    nombreDeCoups++;

                    if (k > n)
                    {
                        Console.WriteLine("> Lower !\n");
                    }
                    else if (k < n)
                    {
                        Console.WriteLine("> Greater !\n");
                    }
                    else
                    {
                        Console.WriteLine("> Congratulations ! The secret number is {0} ( found after {1} attempts )", n, nombreDeCoups);
                        break;
                    }
                } while (n != k);
                Console.Write("\nPress Enter to continue...");
            }
            catch
            {
                Console.WriteLine("YOU MUST ENTER A NUMBER !!!\n");
            }