摘要: #lang racket (define (average x y) (/ (+ x y) 2)) (define (square x) (* x x)) (define (abs x) (if (< x 0) (- x) x)) (define (improve guess x) (average 阅读全文
posted @ 2020-12-10 20:52 pkuimyy 阅读(910) 评论(0) 推荐(0) 编辑