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

int
add_em_up (int count,...)
@{
  va_list ap;
  int i, sum;

  va_start (ap, count);         /* @r{Initialize the argument list.} */

  sum = 0;
  for (i = 0; i < count; i++)
    sum += va_arg (ap, int);    /* @r{Get the next argument value.} */

  va_end (ap);                  /* @r{Clean up.} */
  return sum;
@}

int
main (void)
@{
  /* @r{This call prints 16.} */
  printf ("%d\n", add_em_up (3, 5, 5, 6));

  /* @r{This call prints 55.} */
  printf ("%d\n", add_em_up (10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10));

  return 0;
@}
