[REBOL] Re: let's re-visit math oper. in a var.
From: mumpsoid:gmx at: 4-Apr-2009 7:55
On Sat, 4 Apr 2009, Anton Rolls wrote:
> Just before you go, try this:
> Paste it into your console or put it in a script.
>
> print "Press escape to exit the loop."
> forever [
> num1: to-integer ask "Enter the 1st number: "
> num2: to-integer ask "Enter the 2nd number: "
> op: all [pos: find "+-*/" ask "Enter an operator [+ - * /]: " get to-word form first
pos]
> result: op num1 num2
> print ["result:" result]
> ]
>
> Note that TO-INTEGER needs valid input, or errors to be trapped,
> but we can add that later. OP is here guaranteed to be one of the
> four operators or NONE (thanks to ALL).
>
> Regards,
> Anton.
>
> mumpsoid-gmx.com wrote:
> > No joy....
> >
> > Thanks for your input! as well as everybody on the list.
> > I think that I'm going to leave REBOL alone for awhile, until
> > I cool off. have a good one....
I see that I wa using the "to-integer' function in the wrong place...
Your "op:" assignment line is of course the key (kudos to you) and I
suspect contains a lot of "keys" to understanding REBOL.
Nice little script! Thanks for the extra mile.... BTW, it works
exactly as to what I had in mind. I don't _need_ this calculator for
anything -- it's merely a learning project. Thanks again.
--
Duke Normandin
A: Because it messes up the order in which people normally read text.
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A: Top-posting.
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