【SICP练习】112 练习3.28

练习3-28

原文

Exercise 3.28. Define an or-gate as a primitive function box. Your or-gate constructor should be similar to and-gate.

代码

(define (or-gate input-1 input-2 output) (define (or-action-procedure) (let ((new-value (logical-or (get-signal input-1) (get-signal input-2)))) (after-delay or-gate-delay (lambda () (set-signal! output new-value))))) (add-action! input-1 or-action-procedure) (add-action! input-2 or-action-procedure) 'ok)

(define (logical-or x y) (if (or (= x 1) (= y 1)) 1 0))

感谢访问，希望对您有所帮助。 欢迎关注或收藏、评论或点赞。

为使本文得到斧正和提问，转载请注明出处：
http://blog.csdn.net/nomasp

版权声明：本文为 NoMasp柯于旺 原创文章，未经许可严禁转载！欢迎访问我的博客：http://blog.csdn.net/nomasp