From: mert0407 AT sable DOT ox DOT ac DOT uk (George Foot)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: hello world
Date: Wed, 12 Feb 1997 17:24:56 GMT
Organization: Oxford University
Lines: 34
Message-ID: <3301fbcd.2363628@news.ox.ac.uk>
References: <5draph$fhk$2 AT thor DOT atcon DOT com>
NNTP-Posting-Host: mc31.merton.ox.ac.uk
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

On Tue, 11 Feb 1997 22:50:01 -0800, Golem <myork AT auracom DOT com> wrote:

>ugh! i can't beleive i got an error for djgpp when i first ran it!! 
>here is my source code, saved as 'hello1.cc':
> main() {
>   printf("Hello world!");
> }
>and when i used the msdos command line:
> gcc -c -Wall hello1.cc
>i get a 'warning: implicit declaration of function 'int printf(...)'
>what the..?? although it goes smoothly from .o to .exe, i want to know 
>what that warning was about, and where i get a list of warnings/errors 
>for djgcc.

As Fred said, the function printf(...) is declared in stdio.h, which
you should #include in your program, at the start, i.e.:

#include <stdio.h>

This should remove the warning.

>i am using the 32-bit protected mode (version 2, i think)
>and what about my keyboard handler that worked in ms C? can i just 
>(rewrite it) or will the protected mode not let me change the dos 
>interrupt? aaargh!!

It will need some rewriting; however, I strongly recommend that you
get Allegro. It's a library of useful games routines, including a
decent keyboard handler, graphics routines, sound, etc etc. Look at:

http://www.talula.demon.co/allegro/

George Foot