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We should reset the counter upon one successful login to fulfil consecutive requirement? consider the following examples: 6 consecutive failed login 1 successful login 2 consecutive failed login -> will...

rjrobben

; mit-scheme 没有nil这个概念，这道题本身就是错的 (define (map p sequence) (accumulate (lambda (x y) (cons x (p y)) ) () sequence)) ; 序列反了 (define (append seq1 seq2) (accumulate cons seq2 seq1)) ; 会报错，参数少一个...

Juminiy

e1-3 不是計算 sum of the two larger numbers，是 sum of the squares of the two larger numbers

2

if 的條件判斷和思路是對的，但是求值過程寫錯了。

Arcovv

(define (e13 a b c ) (cond ((and (

marcocpt

Exercise 3.39 答案有误

2

题目见 http://sarabander.github.io/sicp/html/3_002e4.xhtml#Exercise-3_002e39 你的答案如下 > ; except two normal value, there are one special case > ; second proc read x before first set! works (after square operator, because set! is...

xuxiaoqiao