摘要: 练习2.57 扩充求导程序,使其能处理任意项的和与乘积 点击查看代码 ;原求导程序 (define (deriv exp var) (cond ((number? exp) 0) ((variable? exp) (if (same-variable? exp var) 1 0)) ((sum? e 阅读全文
posted @ 2025-12-27 16:07 檐上落白luckin 阅读(3) 评论(0) 推荐(0)