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racket solutions for 1 and 2

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Lowl3v3l 2017-05-09 19:20:46 +02:00
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#lang racket
(define (fib i)
(cond [(equal? 0 i) 1]
[(equal? 1 i) 2]
(else (+ (fib (- i 1))(fib (- i 2))))))
(define (fiblist it limit lst)
(cond [(equal? limit it) lst]
(else (fiblist (+ it 1) limit
(cons (fib it) lst)))))
(foldl + 0 (filter even? (fiblist 0 4000000 '())))