#lang scheme

(define (displayln x)
  (display x)
  (newline))

(define (my-or a b)
  (if a #t b)) ; Test was written before we had `or`

(define (fib-base? n)
  (my-or (= n 1) (= n 0)))

(define (fib n)
  (if (fib-base? n) 1 (+ (fib (- n 1)) (fib (- n 2)))))

(define (pfib n)
  (displayln n)
  (displayln (fib n))
  (newline))

(define (pfibs n)
  (if (= n (- 1))
      0 ; Hack
      ((lambda ()
         (pfib n)
         (pfibs (- n 1)))))) ; Hack

(pfibs 10)