Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!hydroplane.cis.ohio-state.edu!spencer
From: spencer@hydroplane.cis.ohio-state.edu (Stephen N. Spencer)
Newsgroups: comp.sys.mac.programmer
Subject: String to Float conversion woes...
Message-ID: <74424@tut.cis.ohio-state.edu>
Date: 28 Nov 89 01:29:48 GMT
Sender: news@tut.cis.ohio-state.edu
Reply-To: Stephen N. Spencer <spencer@cis.ohio-state.edu>
Distribution: usa
Organization: The Advanced Computing Center for the Arts and Design
Lines: 26

(Using THINK C 3.02 on a 1Meg Mac Plus...)

Got an interesting problem.  For an application I'm writing, I need to have
the user enter several floating-point values into a dialog box.  Set up the
dialog box and the code to process events while the dialog box (modal) is
up no sweat.  Now I have to get the floating-point number from the dialog
item.  Here's the problem.  I've done:

	GetDItem(myDialog, ID, &iType, &iHndle, &iBox);
	GetIText(iHndle, &iStr);

where iStr is a Str255 variable.  

I see the "StringToNum" function but that won't do me any good.  Spent most
of last evening trying to convert that Str255 to a C string so I could do
"atof()" but that didn't work either.  And, interestingly enough, I must be
using "PtoCstr()" incorrectly -- set it up just like my calls to "CtoPstr()"
and the compiler complained of my call not matching the prototype.

Any suggestions, folks?  I'd really appreciate it.

-=-
Stephen N. Spencer      |"For a successful technology, reality must take
ACCAD, 1224 Kinnear Rd. | precedence over public relations, for Nature
Columbus OH 43212       | cannot be fooled."     - Richard P. Feynman
spencer@heinlein.cgrg.ohio-state.edu OR spencer@cis.ohio-state.edu