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From: dkeisen@leland.Stanford.EDU (Dave Eisen)
Newsgroups: comp.lang.c
Subject: Re: #define problem
Keywords: #define macro
Message-ID: <1991Jun20.144228.25464@leland.Stanford.EDU>
Date: 20 Jun 91 14:42:28 GMT
References: <1991Jun20.051827.23428@ux1.cso.uiuc.edu>
Organization: Sequoia Peripherals, Inc.
Lines: 27

In article <1991Jun20.051827.23428@ux1.cso.uiuc.edu> J-Beauchamp@uiuc.edu writes:
>I have many occurences of 'printf(' which I would like to replace with
>'fprintf(stderr,' in my C program.  Is there a way to do this #define?
>
>#define printf( fprintf(sterr,
>

I agree with another poster that the best way to do this is with a 
text editor. Still, there is a solution along the lines of what you tried.

No, you can't define printf to be fprintf(stderr. But you can do the
following:

#define printf fprintf_stderr

int
fprintf_stderr (const char *fmt, ...)
{
   va_list args;
   int ret;

   va_start (args, fmt)
   ret = vfprintf (stderr, fmt, args);
   va_end (args);

   return ret;
}