I am trying to solve SICP Exercise 1.16. Here is my solution:
(define (fast-expt-iter b n)
(cond ((= n 1) b)
((even? n) (fast-expt-iter (square b) (/ n 2)))
(else (fast-expt-iter (square b) (- n 1)))))I can't find any error when I work it out on paper myself; but when I run it I get the wrong answer.
What am I missing here?