Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!nrl-cmf!ames!pasteur!ucbvax!decwrl!adobe!vonzelow
From: vonzelow@adobe.COM (Jon von Zelowitz)
Newsgroups: comp.windows.ms
Subject: Re: Windows and Floating Point
Keywords: windows, floating, link4
Message-ID: <372@adobe.UUCP>
Date: 31 Jan 89 03:54:41 GMT
References: <332@rna.UUCP>
Reply-To: vonzelow@adobe.UUCP (Jon von Zelowitz)
Organization: Adobe Systems Incorporated, Mountain View
Lines: 26

In article <332@rna.UUCP> kc@rna.UUCP (Kaare Christian) writes:
>I am having trouble using floating point code in my windows programs.
>(Env -- msc 5.1, new libraries from Genie which were called C5FIX,
>the new Genie link4, win sdk1.04)

I just went through a conversion to 5.1, and I may have seen the same
problem. 

As I understand it, in K&R C, all floating point values passed between
functions are promoted to doubles. We had code which claimed in the function
headers and (old-style) prototypes to pass floats. That was OK in 4.0.

In MS C 5.10, the following happens:

- A warning message, "parameter <name> declaration different", is
printed. 

- The resulting code from the compiler DOES NOT work correctly.

In my opinion, this calls for more than a warning!

Try changing code to use doubles, or use ANSI prototypes to cure this.

See Microsoft Online Q29686. Good luck...

   ...sun!adobe!vonzelow   Jon von Zelowitz