[plt-scheme] to define, or to let

======= 2004-03-19 08:05:22 ：=======

>1) Do these two generate the same code?
>2) Which one best contains the spirit of scheme?
>
>(define a-function-using-defines
>   (lambda ()
>     (define one-variable 3)
>     (define another-variable 4)
>     (list 3 4))) ; just checking
>
>(define a-function-using-let-list
>   (lambda ()
>     (let ((one-variable 3)
>           (another-variable 4) )
>       (list 3 4)))) ; just checking
>
>rac
>
= = = = = = = = = = = = = = = = = = = =

IMO, 

(define a-function
  (lambda ()
    (define one-variable 3)
    (define another-variable 4)
    (list one-variable another-variable))) 

is just the same as 

(define a-function
  (lambda ()
    (letrec ((one-variable 3)
             (another-variable 4))
      (list one-variable another-variable))))

And these two will generate same code. 

regards,
Zhu Chongkai