printf() --can I duplicate it?

[Lynux-Penguin]

_CRTIMP int __cdecl printf(const char *, ...);

Ok this is the prototype in the header file stdio.h
now, notice the ..., i know from use that the '...' allows me to clarify values inputted into the string aka

printf("hello, d = %d\n",d);

how exactly does this work and can I duplicate it, how would the function definition look?

[master5001]

This is kind of crappy in terms of utility but you get the idea.

#include <stdarg.h>
#include <stdio.h>

int stuff(int number, ...) {
   va_list list;

   va_start(list, number);
   for(;number--;)
      printf("%d ", va_arg(list, int));
   va_end(list);
}

int main(void) {
   stuff(5, 35, 21, 32, 11, 10);
   return 0;
}

the first parameter represents the number of ints to follow. Each following parameter is printed to the screen.

[edit]turned off those damn smilies[/edit]

[Lynux-Penguin]

but printf doesn't know how many parameters are passed into it...
right?

yeah well I kinda get that now, but if you could fine the actual C definition for printf, that would be cool