2010年2月3日
今天英语有何新收获
摘要： 托福听说训练 http://www.lixiaolai.com/index.php/archives/4055.html 阅读全文
posted @ 2010-02-03 19:33 江振 阅读(135) 评论(0) 推荐(0)
sicp 练习1.7
摘要： (define (mysqrt x) (sqrt-iter 1.0 x)) (define (sqrt-iter guess x) (if (good-enough? guess x) guess (sqrt-iter (improve guess x) x)))(define (good-enough? guess x) (<(/ (abs(- (improve guess x) gues... 阅读全文
posted @ 2010-02-03 17:12 江振 阅读(229) 评论(0) 推荐(0)