NetNews Offline 2/NetNews Offline Volume 2.iso/news/comp/lang/c-part1/3895

Internet Message Format | 1996-08-05 | 1.7 KB

Path: news.chattanooga.net!usenet
From: "Eric W. Bradway" <[e-mail]>
Newsgroups: comp.lang.c
Subject: Re: What's wrong here?
Date: Wed, 31 Jan 1996 13:33:35 -0500
Organization: Micro Sports, Inc.
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Simon Hosie wrote:
>   Watcom gives the following warnings (and _only_ those warnings) compiling
> the above code (except without the line numbers or colons), but only when
> it's compiling it as C++ and generating 32 bit code (GCC doesn't, no matter
> how hard I try).  I don't know C++ myself, but my flatmate is learning it,
> does it have anything to do with the typedef?
>
> TEST.CPP(12): Warning! W389: (col 15) integral value may be truncated during
>               assignment or initialization
> TEST.CPP(17): Warning! W389: (col 15) integral value may be truncated during
>               assignment or initialization

The typedef doesn't matter. Try turning off the optimizer (-od). Lines
12 is where a, b, c are first used and the uncasted numeric constants
are being resolved. Again, at line 17, d is being access (not
assigned?!?) for the first time.

You may be able to clear everything up by changing lines 9-11 to:
  a = (word) 1;
  b = (word) 2;
  c = (word) 3;

In my experience, WATCOM gives more warnings about this sort of thing
than any other C/C++ compiler I've worked with. It also defaults to full
optimizations which can have strange effects on your code (usually not
your warnings however).

-Eric