[plt-scheme] Creating Executable

> To flush stdout, use:
> 
>   (flush-output)
> 
> as in:
> 
>   (define (prompt-user-for-number)
>     (printf "Number please: ")
>     (flush-output)
>     (read))


Great! :)
It's working now. But, how can I make (read-line) work in the
example I sent. Somehow it is not workig. :(

Best regards,

Paulo

> 
> You might also consider using Paul Graunke's web servlets for getting
> input or the MrEd manual for GUI input (of course, those are going to
> require some work to read the documentation, but they are more modern
> ways of communicating with your user).
> 
> Robby
> 
> At 07 Sep 2002 17:46:28 +0100, Paulo J. Matos wrote:
> > 
> > > 
> > > You can use things like `read' or the teachpacks for getting input from
> > > the user, if you'd like.
> > > 
> > 
> > I'm really having a problem at reading user input sometimes, and
> > also, printing if it is not ended by ~n.
> > For example:
> > (define-struct tran (val type date comment))
> > 
> > (define read-tran 
> >   (lambda ()
> >     (let ((val "")
> >           (comment "")
> >           (type 0))
> >       (printf "Creation of new Transaction~n")
> >       (printf "Amount: ")
> >       (set! val (read))
> >       (set! type (get-type))
> >       (printf "Comment: ")
> >       (clean-input-buf (current-input-port))
> >       (set! comment (read-line))
> >       (make-new-tran val type
> >                      comment))))
> > 
> > (define get-type 
> >   (lambda ()
> >     (print-type-options)
> >     (printf "Type: ")
> >     (read-numeric-char)))
> > 
> > ;Prints possible types of transaction for user
> > (define print-type-options
> >   (lambda ()
> >     (printf "Type Options:~n")
> >     (printf "\t~a - Debit~n" *DEB*)
> >     (printf "\t~a - Credit~n" *CRED*)))
> > 
> > ;to remove anything from input-buffer kind of flush(stdin) or
> > ;something like that
> > (define clean-input-buf
> >   (lambda (buf)
> >     (if (char-ready? buf)
> >         (begin
> >           (read)
> >           (clean-input-buf buf)))))
> > 
> > 
> > If I make a (read-tran) it won't receive the comment. :(
> > > (read-tran)
> > Creation of new Transaction
> > Amount: 1243
> > Type Options:
> > 	1 - Debit
> > 	2 - Credit
> > Type: 2
> > Comment: 
> > #(struct:tran 1243 2 #(struct:date 13 41 17 7 9 2002 6 249 #t 0)
> > "")
> > 
> > Any ideas?
> > 
> > Another things happens only if I make it an executable. When I
> > do:
> > (printf "Input option: ")
> > (read)
> > 
> > The read will be done before the printf. How can I flush(stdout)?
> > 
> > Best regards,
> > 
> > Paulo
> > 
> > > Robby
> > > 
> > 
> > -- 
> > Paulo J. Matos : pocm(_at_)mega.ist.utl.pt
> > Instituto Superior Tecnico - Lisbon    
> > Software & Computer Engineering - A.I.
> >  - > http://mega.ist.utl.pt/~pocm 
> >  ---	
> > 	Yes, God had a deadline...
> > 		So, He wrote it all in Lisp!
> 
> 

-- 
Paulo J. Matos : pocm(_at_)mega.ist.utl.pt
Instituto Superior Tecnico - Lisbon    
Software & Computer Engineering - A.I.
 - > http://mega.ist.utl.pt/~pocm 
 ---	
	Yes, God had a deadline...
		So, He wrote it all in Lisp!