(1) 客户余额的输出采用类似n元n角n分这样的形式。

(2) 允许客户存款、取款和转账，并允许客户取款时透支，即允许客户欠款（透支有限额，超过了就不能进行取款）。

(3) 设计一个主程序进行基本情况的演示。- (1) customer balances such a form similar to the angle of n n n points.

 　(2) allows the customer deposits, withdrawals and transfers, and allows customers to overdraft withdrawals, which allows customers arrears (overdrafts limits can not be exceeded withdrawals).

 　(3) the design of a main program demonstrates the basic situation.