9.　　银行账户管理

问题描述

设计一个银行账户管理程序，账户的信息有账号（唯一）、姓名、余额、身份证号码、单位、电话号码、地址等，允许用户进行如下操作：开户、销户、存款、取款、转账、查询，一个用户可以有多个户头，账户的数值没有上限。

-9. The management of bank accounts to describe the design of a bank account management program, account information with account number (only), name, balance, identity card number, unit, telephone numbers, addresses, allowing users to do the following: accounts, sales households , deposits, withdrawals, transfers, queries, a user can have multiple accounts, account value is no upper limit.