利用AT89C51单片机做主控单元实现电子密码锁功能，密码锁是通过先由手动设定数值，然后利用单片机识别当前数字与密码是否匹配~-Make use of AT89C51 single-chip main control unit realize electronic code lock, password lock manually through the first set value, and then identify the current use of single-chip digit