简单ATM（Automatic Teller Machine）系统的基本功能包括登录、注销、查询、存款、取款以及修改密码。

模拟的ATM终端在用户登录时，将其账号和密码通过网络传送到ATM服务器，ATM服务器根据数据库中的信息查询该账号和密码是否正确，并将结果返回给ATM终端。如果账号和密码正确，ATM终端进入下一操作界面；否则提示出错。注销操作用于通知ATM服务器本次交易结束，查询、存款、取款以及修改密码操作都是先将命令发送给ATM服务器，再由ATM服务器在数据库上执行相应操作，并将操作结果返回给ATM终端。

-simple ATM (Automatic Teller Machine) system the basic functions Login including write-offs, inquiries, deposits, withdrawals and alter the code. Simulation of ATM terminal users logged in, their account numbers and passwords through the ATM network to transmit to the server, ATM database server based on the information to confirm the account number and password is correct, the results back to the ATM terminal. If the correct account number and password, the ATM into the next terminal interface; Otherwise prompt mistakes. Cancellation notice for the operation of the server ATM transactions concluded inquiries, deposits, withdrawals and alter the code operations are first sent an order to ATM servers, ATM by the database server implementation of the corresponding operation and operating res