how is the sicp cons-stream implemented?

Question

I\'m working through the streams section of the scip and am stuck on how to define a stream.

The following is my code:

(define (memo-func function)
          


        

Answer 1

You cannot define delay as a function, since prior to calling it, Scheme will evaluate its argument - which is exactly what you're trying to postpone. SICP says this explicitly that delay should be a special form.