纯函数式语言的I/O系统

函数式程序设计是指程序完全由函数组成,其中都有一个主函数,主函数是根据其它函数来定义的,直到最低层函数成为函数式语言所提供的基本函数为止。

Purely functional programming-languages are restricted on the application scope to some extents because they eonnot deal with I/O very well.This paper discusses five purely functional I/ O approaches.These I/O approaches show that I/O can be incorporated in purely functional lan- guages without losing the advantage of purely functional languages.