public void start()
        {
            try
            {
                ///////
                tools.ask_no_clinet_echo();
                tools.reset_color();
                tools.set_cursor_loc_org();
                tools.clearscreen();

                bool check_ok = false;
                while (tcc.Connected)
                {
                    tools.set_cursor_loc_org();
                    tools.printfile(@"/etc/wellcome.ansi");
                    tools.print("歡迎來到 erspicu_brox 的 bbs ", 14, 0);
                    tools.print("(或以guest參觀,new註冊帳號)", 17, 0);
                    tools.print("請輸入登入帳號 : ", 16, 0);

                    tools.print_inputbox(12, ConsoleColor.Red, ConsoleColor.White);

                    string loginid = tools.get_input_line(10);

                    tools.reset_color();

                    if (loginid == "new")
                    {
                        registration();
                        check_ok = true;
                    }
                    else if (loginid == "guest")
                    {
                        clinet_profile = new clinet_datastruct();
                        clinet_profile.id = "guest";
                        clinet_profile.passwd = "";
                        clinet_profile.nickman = "我是訪客";
                        clinet_profile.mail = "";
                        check_ok = true;
                    }
                    else
                    {
                        check_ok = login_check(loginid);
                    }

                    //最後進入主選單
                    if (check_ok == true)
                    {
                        Console.WriteLine(clinet_profile.id + " (" + tcc.GetHashCode().ToString() + ") " + "登入");
                        system_main_menu();
                    }
                }
                Console.WriteLine("Clinet已登出.");
            }
            catch
            {
                Console.WriteLine("Clinet(" + tcc.GetHashCode().ToString() + ") 已關閉連結");
            }
        }
        public bool login_check(string id)
        {
            //檢查此帳號是否存在
            if (!File.Exists(Directory.GetCurrentDirectory() + "/UserID/" + id + "/.PassWord"))
            {
                tools.print("此帳號不存在,按任意鍵繼續..", 20, 0);
                tools.pause();
                tools.set_cursor_loc(20, 0);
                tools.clear_cursor2LineEnd();
                return false;
            }

            //輸入密碼
            tools.print("請輸入密碼 : ", 18, 0);
            tools.print_inputbox(12, ConsoleColor.DarkBlue, ConsoleColor.White);
            string passwd = tools.get_input_password(10, '*');
            tools.reset_color();

            string sha1 = File.OpenText(Directory.GetCurrentDirectory() + "/UserID/" + id + "/.PassWord").ReadToEnd();

            while (sha1 != tools.get_sha1(passwd))
            {
                tools.print("密碼錯誤,按任意鍵繼續...", 20, 0);
                tools.pause();
                tools.set_cursor_loc(20, 0);
                tools.clear_cursor2LineEnd();

                tools.print("請輸入密碼 : ", 18, 0);
                tools.print_inputbox(12, ConsoleColor.DarkBlue, ConsoleColor.White);
                passwd = tools.get_input_password(10, '*');
                tools.reset_color();
            }

            tools.print("帳號密碼確認無誤,按任意鍵繼續...", 20, 0);
            tools.pause();

            clinet_profile = new clinet_datastruct();
            clinet_profile.id = id;

            return true;
        }
        public void registration()
        {
            tools.clearscreen();
            bool check_ok = false;
            string newid = "";
            while (check_ok == false)
            {
                tools.print("請輸入註冊帳號 : ", 2, 5);

                tools.print_inputbox(10, ConsoleColor.Red, ConsoleColor.White);
                newid = tools.get_input_line(12);

                //判斷是否已被註冊過
                if (Directory.Exists(Directory.GetCurrentDirectory() + "/UserID/" + newid + "/"))
                {
                    tools.reset_color();
                    tools.print("本ID已被註冊過,請改換註冊ID", 3, 5);
                    check_ok = false;
                }
                else
                {
                    tools.set_cursor_loc(3, 5);
                    tools.clear_cursorLine();
                    check_ok = true;
                    tools.reset_color();
                    tools.print("OK!", 2, 0);
                    Directory.CreateDirectory(Directory.GetCurrentDirectory() + "/UserID/" + newid + "/");
                }
            }
            //

            tools.print("請輸入註冊密碼 : ", 4, 5);
            tools.print_inputbox(10, ConsoleColor.Red, ConsoleColor.White);
            string passwd = tools.get_input_password(10, '*');
            tools.reset_color();
            tools.print("OK!", 4, 0);

            tools.print("請輸入暱稱 : ", 6, 5);
            tools.print_inputbox(10, ConsoleColor.Red, ConsoleColor.White);
            string nickname = tools.get_input_line(10);

            tools.reset_color();
            tools.print("OK!", 6, 0);

            tools.print("請輸電子信箱 : ", 8, 5);
            tools.print_inputbox(22, ConsoleColor.Red, ConsoleColor.White);
            string mailurl = tools.get_input_line(20);

            tools.reset_color();
            tools.print("OK!", 8, 0);

            clinet_profile = new clinet_datastruct();

            clinet_profile.id = newid;
            clinet_profile.nickman = nickname;
            clinet_profile.passwd = passwd;
            clinet_profile.mail = mailurl;

            //建立帳號
            File.WriteAllText(Directory.GetCurrentDirectory() + "/UserID/" + newid + "/" + ".PassWord", tools.get_sha1(passwd));

            tools.print("恭喜!註冊完畢.按任意鍵繼續..", 10, 5);
            tools.pause();
        }