使用图形用户界面。当输入给定的卡号和密码（初始卡号和密码为123456）时，系统能登录ATM柜员机系统，用户可以按照以下规则进行：

1、查询余额：初始余额为10000元

2、ATM取款：每次取款金额为100的倍数，总额不超过5000元，支取金额不允许透支。

3、ATM存款：不能出现负存款。-Use graphical user interface. When you enter a given number and password (the initial number and the password is 123456), the system can log ATM ATM system, the user can follow the following rules: 1 balance inquiry: the initial balance of 10,000 yuan 2, ATM withdrawals : amount of each withdrawal in multiples of 100, total no more than 5,000 yuan, the amount of withdrawal does not allow overdrafts. 3, ATM deposits: deposits can not be negative.