设计一个具有较高安全性和较低成本的通用电子密码锁，其具体功能要求如下：(1) 数码输入：每按下一个数字键，就输入一个数值，并在显示器上的最右方显示出该数值，同时将先前输入的数据依序左移一个数字位置。(2) 数码清除：按下此键可清除前面所有的输入值，清除成为“0000”。(3) 密码更改：按下此键时会将目前的数字设定成新的密码。(4) 激活电锁：按下此键可将密码锁上锁。(5) 解除电锁：按下此键会检查输入的密码是否正确，密码正确即开锁。

-Design of a high security and lower-cost generic electronic locks, its specific functional requirements are as follows: (1) Digital Input: Each press a number key, you enter a numeric value, and the display on the far right shows out the value, while the previous input data in sequence left a number of locations. (2) Digital Clear: Press this key to clear all the previous input values, clear as " 0000."　(3) password change: press this key will set the current figure into a new password. (4) to activate electric locking: Press this key lock can be unlocked. (5) The lifting of electric locking: Press this button will check the password is correct, the password is correct that the unlock.