假设银行Bank已经有了按整年year计算利息的一般方法，其中year只能取正整数。参照建设银行或青岛银行，再编写一个商业银行，让程序输出8000元存在商业银行8年零236天的利息-Bank Bank have assumed that the general method of calculating interest by the whole of year, where year can only take positive integer. Referring to the constr