Develop, write and certify a properly recursive procedure reverseDigits to input a positive integer n and to...

4.2 Ratings (807 Votes)

//define the logic first

(define

invert-number-aux (Î» (n res)

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (if (empty? n) res

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (invert-number-aux

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (take n (-(length n) 1)) ;new n

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (append res (list (last n))) ;new res

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â )

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â )))

(define

invert-number (Î» (n)

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (string->number (list->string (invert-number-aux (string->list(number->string n)) '())))

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ))

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