Trying out exercises from "Structure and Interpretation of Computer Programs" second edition
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

21 lines
472 B

(define (square n)
(* n n))
(define (smallest-divisor n)
(find-divisor n 2))
(define (find-divisor n test-divisor)
(define (next iterator)
(if (= iterator 2) 3 (+ iterator 2)))
(cond ((> (square test-divisor) n) n)
((divides? test-divisor n) test-divisor)
(else (find-divisor n (next test-divisor)))))
; find-divisor
(define (divides? a b)
(= (remainder b a) 0))
(smallest-divisor 199)
(smallest-divisor 1999)
(smallest-divisor 19999)