Path: chuka.playstation.co.uk!news
From: "Mark Wilson" <m.wilson@dial.pipex.com>
Newsgroups: scee.yaroze.programming.codewarrior
Subject: Debugger problem
Date: Sun, 7 Jun 1998 19:35:10 +0100
Organization: PlayStation Net Yaroze (SCEE)
Lines: 37
Message-ID: <6lemid$1293@chuka.playstation.co.uk>
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Another bug-ette has just reared its head, unless I've done something really
stupid... which has been known.

A routine I was working on was playing up, so I stuck in a breakpoint. There
my troubles began.

void GetCurrentPosition(Obj *obj)
{

 short i, d, deltax, deltay;

 int dinc1, dinc2, xinc1, xinc2, yinc1, yinc2;

 deltax = obj->tx - obj->sx;
 deltay = obj->ty - obj->sy;

Setting a breakpoint on the "deltay = " line I noticed that deltax was
coming out as 0, not -640. Stepping through the next line, I found that
deltay was being calculated OK.

So I stuck in a printf before the calculation like

printf("%d\t%d%t%d\n", obj->tx, obj->sx, obj-tx - obj->sx);

which returned exactly the figures I'd expected, 0, 640 and -640. A printf
AFTER the calculation showed that deltax was in fact being set up correctly,
and was just not being displayed in the debugger.

Any ideas?

Mark