SICP:1.31按照公式求Pi值，原理同1.29
摘要：
#lang racket;product doing the multiplation(define (product term a next b) (if (< b a) 1 (* (term a) (product term (next a) next b)) ... 阅读全文
posted @ 2015-03-28 17:11 Zachary_wiz 阅读(177) 评论(0) 推荐(0) 编辑
