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' s basic functions include logon, logoff, inquiries, deposits, withdrawals, and change your password. Simulation of ATM terminals in the user logs on, their account number and password through the network to the ATM server, ATM server, according to information in a database query to the account number and password are correct, and the results returned to the ATM terminal. If the account number and password are correct, ATM terminals into the next user interface　otherwise prompt an error. ATM write-off operation of the server used to notify the end of this transaction, inquiry, deposits, withdrawals, and change password operations are first command sent to the ATM server, the database server by the ATM to perform the appropriate operations and results of operations back to the ATM terminal .