Subj : Re: varargs(ish)
To   : comp.programming
From : pete
Date : Sun Aug 21 2005 02:52 pm

pemo wrote:
> 
> I'd like to write a C function that can
> accept variable args *and* a fixed
> arg that tells the function whether
> to output to stdout and optionally, a file.
> 
> So, I want something like this ...
> 
> void out(int outputType, const char * format, ...)
> {
>     switch(outputType)
>     {
>         case 1:
>             fprintf(logFile, format, ????);
> 
>             // Fall Through.
> 
>         case 2;
> 
>             printf(format, ????);
>             break;
> 
>         default:
>             break;
> }
> 
> The question is, what do I put for the ???? please!?

I think you just want fprintf.

int fprintf(FILE *stream, const char *format, ...);

A call to fprintf with the first argument equal to stdout,
is the same as a call to printf.
If you want to write to a text file, 
use the FILE type pointer to the text file 
for the first argument instead.

-- 
pete

.