On Tue, 17 Jun 1997, Peter Naulls wrote:

> > > void main(void) {
> > >  FILE *f;
> > >  f = fopen("/dev/lpt0");
> > >  while (!feof(f)) putchar(fgetc(f));
> > > }
> > 
> > A quick look in the (HPUX) manpage shows the following:
> > 
> >       FILE *fopen(const char *pathname, const char *type);
> > 
> > so use `fopen("/dev/lpt0", "r")' !
> 
> Yeah, you're right of course - had slipped my mind.  This could
> just as easily cause a crash.  I suggest people use -Wall on gcc :)

A missing argument is an error, not just a warning.  You should always
include the appropriate headers (eg <stdio.h>) - that way you get
prototypes and the compiler can catch things like this.

(Or did you mean that -Wall causes gcc to moan about function calls that
haven't been prototyped?)

p.