/*
** $Id: args.c 802 2008-03-01 19:26:43Z phf $
**
** Handling variable-length parameter lists, aka "How to
** implement printf() if you really really need to." No
** time for comments right now, enjoy reading the code.
*/

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <stdarg.h>

int add(int howmany, ...) // and whatever follows
{
  va_list ap;
  va_start(ap, howmany);

  int sum = 0;

  for (int i = 0; i < howmany; i++) {
    int x = va_arg(ap, int);
    sum += x;
  }    

  va_end(ap);
  return sum;
}

int main()
{
  printf("Great: %d\n", add(5, 1, 2, 3, 1, 1));
  printf("Hmmm: %d\n", add(3, 1, 2, 3, 1, 1));
  printf("Oops: %d\n", add(7, 1, 2, 3, 1, 1));
  return EXIT_SUCCESS;
}