From: David Jenkins <me AT jenkinsdavid DOT demon DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: register int variable Is there any point???
Date: Thu, 27 Feb 1997 02:56:07 +0000
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In article <ws6jCCAYMEFzEwZ0 AT jenkinsdavid DOT demon DOT co DOT uk>, David Jenkins
<me AT jenkinsdavid DOT demon DOT co DOT uk> writes
>
>So why doesn't DJGPP let me change an int variable to a register int
>variable??
>
Yes I was using the "d" variable as a global.This is were I was going
wrong.
I've been working through a tutorial using what programing knowledge I
have from my basic days and applying them to a simple demo type program
I'm using to apply newfound knowledge.
Since I'm used to using globals most of the time in basic,I've been
finding it hard to convert to the C methods.Which I now understand a
little better.

I used a simple
rawclock()-timebefore_loop_was_started
for timing a heavy loop using normal int variable in for(d=1 to 1000)
and again using a register int in for(d=1 to 1000) the resulting time
difference was almost unnoticable.
Is there any point in using a register int in a for loop???
Or am I using a timing method which is incorrect??

-- 

David Jenkins