Did you include stdio.h?
> On Sun, Dec 26, 2010 at 1:58 AM, ali hagigat <hagigatali@xxxxxxxxx> wrote:
> > Please look at the following program:
> >
> > main(){
> > printf("func1= %d\n", func1(10));
> > }
> >
> > /root/tmp3> gcc -c -o prog1.o prog1.c
> > prog1.c: In function ?main?:
> > prog1.c:6: warning: incompatible implicit declaration of built-in
> > function ?printf?
> > -------------------------------------------------------------------
> > Why the declaration of printf is incomplete?
>
>
http://www.google.com/#sclient=psy&q=warning:+incompatible+implicit+declaration+of+b
uilt-in+function
>
>
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