汇编语言实现的简易登陆系统，

1、用户登陆：用户通过输入已注册的用户名和密码登陆，输入正确显示功能界面，否则显示重输提示。

2、注　　册　　：在登陆输入用户名时，通过输入‘new’来注册新用户。当注册新用户名已经存在时，则　　提示重新输入。

3、功能界面：修改当前登陆用户的密码，显示所有已注册用户的信息，退出程序。

4、数据保存：以文件形式保存在D:\\users.dat，每个记录30个字节，每个记录包含两个字段，用户　　名（20B）和密码（10B）。

-compilation of simple language landing system, a user landing : users input registered user name and password landing, the correct display interface, heavy losers showed otherwise suggest. 2, registration : the landing enter a user name, through the importation of 'new' to register new users. When registering a new user name already exists, then suggested re-importation. 3, the functional interface : modification of the current landing user passwords, showing all registered users of the information, the withdrawal procedure. 4, data retention : in the document kept in the form D : \\ users.dat, each recorded 30 bytes each record contains two fields, user name (20B) and password (10B).