stream-oriented input/output

• 流式输入输出

stream-oriented input/output的用法和样例：

例句

1. In RPN, to input an equation, you usually start from the inner core to the outer.For a given equation, there are many input sequences that lead to the same answer.
   一般来说后置序式输入都是由内而外打进去，而且一条数式往往不同的输入顺序都可以得到同样的答案。