From:	"Damian Yerrick" <die DOT spammers AT pineight DOT 8m DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: how to use atof(); prototyping
Date:	Mon, 6 Sep 1999 00:37:46 -0500
Organization:	Rose-Hulman Institute of Technology
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Berti Drost <Berti DOT drost AT gmx DOT net> had some problems with
atof() in the C library. (atof() converts a string to a double.)
Someone named Steven fixed the problem. Berti wrote:

> Ah...I've found the error...still strange: If I add
> #include <stdlib.h>
> it works correctly, if I don't, it can be compiled, but atof returns
strange
> numbers; I wonder why...
> (Thanx, Steven)

That's because atof() is prototyped in stdlib.h; a prototype tells
the C/C++ compiler how to convert parameters and return values
for a function. Turn on your compiler warnings with the -Wall option
in GCC to warn about missing prototypes in the future.

However, M$ Visual C-- insists on an explicit cast in every single
case; otherwise, it spams the compiler error output with dumb
warnings, something like "Warning: integer widths don't match;
converting." That's what makes me want to use RSXNTDJ.
Download it at the Zip Picker (http://www.delorie.com/djgpp);
then http://surf.to/rsxntdj to set it up

Damian Yerrick
http://come.to/yerrick

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