说明：  ATM柜员机模拟程序，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。 （4）修改密码：新密码长度不小于6位，不允许出现6位完全相同的情况，只有旧密码正确，新密码符合要求，且两次输入相同的情况下才可以成功修改密码。
(ATM ATM simulation program, using a graphical user interface. When entering the given number and password (initial card number and password is 123456), the system can log an ATM system, users can follow these rules: (1) balance inquiry: initial balance of 10,000 yuan (2) ATM withdrawals: Each withdrawal amount is a multiple of 100, totaling no more than 5,000 yuan, the amount paid does not allow overdrafts. (3) ATM Deposit: not a negative deposit. (4) Change Password: The new password length is not less than 6, the same situation six are not allowed, only the old password is correct, the new password meets the requirements, and the next two enter the same circumstances can successfully change the password.)