On Mon, 30 Aug 2010 15:43:40 -0700 Mike Chen <mickey.ch...@gmail.com> wrote:
> Hi, > > I am a caml rookie, and I need your help. > > (* pp is a very simple function *) > # let pp list = > let newList = ref [] in > let i = ref 0 in > let ele = ref (List.nth list !i) in > while (!ele) != 5 do > newList := List.append !newList [(!ele mod 3)]; > i := !i + 1; > done; > !newList;; > val pp : int list -> int list = <fun> > > # pp [ 3; 4; 5];; > > (* it seems it goes into a forever loop, but I expect it returns [ 0; > 1]. What is wrong? *) > You never update the value of ele, and so the only way the loop conditional can ever be false is if the list you pass to the function starts with a 5. -- Shawn Wagner sha...@speakeasy.org _______________________________________________ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
