用户密码登录程序。选择用户名，并输入相应的密码——默认（123），管理员（1234），客户（12345）。若密码正确，则弹出登录成功对话框，否则，弹出密码错误的对话框，并响警示音，在登录次数少于5时，继续等待登录按键按下。登录次数可以转换成二进制通过前面板的指示灯显示。登陆次数达到5次时，程序结束。-User password login procedure. Select a user name and enter the appropriate password- the default (123), administrator (1234), customers (12345). If the password is correct, then the pop-up dialog login is successful, otherwise an error dialog box pops up the password, and loud warning sound, fewer than 5 in the registry and continue to wait for log on button is pressed. Logins can be converted into a binary indicator on the front panel display. Sign In to 5 times the number, the program ends.