CSC302 2006S, Class 10: Lab on Continuations

Admin:
* If, when the semester ends, you would like any of the instances of your name removed from the course Web site, please let me know then.
* Office hours end at 1:45 today.
* Don't forget the Math/CS lunch!
* Questions on the homework?
* The hidden dangers of posting assignments online.
* Lab by Oge.

Overview:
* Lab!

Questions:
* Can I write functions in C that have untyped parameters?
  * Yes, you can use the varargs facility.
  * But then you need a way to figure out the type of the parameters (and C doesn't give you one)a
  * A better solution: Use pointers, and cast as appropriate.

(define better-list-product
 ; Put the let/cc here?
  (lambda (ls)
    ; Put the let/cc here?
    (let/cc k
       (let kernel ((ls ls))
 ; Put the let/cc here?
         (cond ((null? ls) 1)
              ((zero? (car ls))
               ; Put the let/cc here?  No, has no real effect.
               (k 'zero))
              (else (* (car ls) (kernel (cdr ls)))))))))