Question

I’m using va_list, va_start, va_end to play with printf-like functions.

void test(char* format, ...)
{
    va_list argp;
    va_start(argp, format);
    vprintf(format, argp);
    va_end(argp);
}

Now I wonder how can I write all those parameters to file like fwrite() -> vfwrite() or something. Is there a way without implementing my own fwrite function that can write variable number of parameters ?

Answer 1

Yes, you want vfprintf().

It’s just like vprintf() but it accepts a FILE * as its first argument.