Created
April 22, 2012 20:21
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Print 1 to 100 without loops or conditionals
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;; This creates a function that will print n and increment it on every call. | |
(define (make-printer) | |
(let ((n 1)) | |
(lambda () | |
(display n) | |
(newline) | |
(set! n (+ n 1))))) | |
;; The "add" function returns the function that executes the parameters f and g | |
;; one after the other. | |
;; | |
;; The "times-N" functions return functions that execute their parameter N | |
;; times in sequence. | |
(define (add f g) (lambda () (f) (g))) | |
(define (times-2 f) (add f f)) | |
(define (times-5 f) (add (times-2 (times-2 f)) f)) | |
(define (times-10 f) (times-2 (times-5 f))) | |
;; Run the solution for this "problem". | |
((times-10 (times-10 (make-printer)))) |
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