功能：当使用机子的人离开电脑后，可以根据提示输入密码,锁定本机,进入时输入密码-Function: When the person using the machine to leave the computer, can prompt for a password, lock the machine, the time of entry to enter a password

一个matlab小程序，三次输错密码后，可以调用摄像头进行拍照，并发送飞信和电子邮件（当然需要进行必要的设置，注释很清楚）-A small matlab program, three times the wrong password, you can call the camera to take pictures and send flying letters and e-mail (of course, need to take the set, comments very clear)