一个用51单片机实现安全密码锁功能的程序，内部有注释。两个密码登陆，一个是初始化的由单片机自身程序的密码，对应OPEN函数，高级管理员密码使用OPENNOW函数。-A single chip with 51 security password lock function of the program, an internal note. Two password login, one is initialized by the microcontroller program code itself, corresponding to OPEN function, the senior administrator password to use OPENNOW function.