Path: utzoo!attcan!uunet!wuarchive!psuvax1!xavier!jackiw
From: jackiw@cs.swarthmore.edu (Nick Jackiw)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Floating Point #'s as Strings in Dialogs using Think C 3.0
Message-ID: <KB7KKSB@xavier.swarthmore.edu>
Date: 11 Jun 90 17:09:17 GMT
References: <25837@netnews.upenn.edu>
Sender: news@xavier.swarthmore.edu (Usenet News)
Reply-To: jackiw@cs.swarthmore.edu (Nick Jackiw)
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Organization: Visual Geometry Project, Swarthmore College, PA
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isler@grad1.cis.upenn.edu () writes:
> I am writing a program in Think C 3.0 in which I would like to convert
> floating point numbers to strings and place them in EditText items in
> a dialog box. 
>  sprintf(str, "%3.1f", value);
> 
> Any suggestions?
> S-K ISLER

As mentioned previously, you'll need a Pascal string instead of a c-string.
You may be better served by using the Toolbox, instead of C, to do your
conversions for you.  SANE implements the calls:

procedure Str2Dec(s:DecStr;var Index:integer; var d:Decimal;
                  var validPrefix:boolean);

procedure Dec2Str(f:Decform; d:Decimal; var s:DecStr);

procedure CStr2Dec(s:CStrPtr;var index:integer; var d:Decimal;
                  var validPrefix:boolean);

which will do all the necessary conversions for you.  In addition to
providing the appropriate types to your task, SANE is script-manager
compatible, which may or may not be true of THINK C's sprintf. This
means that if your application is for public use, it will format (and
accept formatted numbers) appropriately to the country in which it's
in use.

See your SANE interface files for declarations of the individual types.



--
-----Nicholas Jackiw [jackiw@cs.swarthmore.edu|jackiw@swarthmr.bitnet]-----
"... Then, with an infernal shovel that increases my strength, I dig out of
that inexhaustable mine whole chunks of lice, big as mountains.  I split them
up with an axe and I transport them in the depths of night to city streets."