#include <stdarg.h>

void vafunction (char *dummy, ...)
{
  double darg;
  int iarg;
  int flag = 0;
  int i;
  va_list ap;

  va_start(ap, dummy);
  for (i = 1; i <= 18; i++, flag++) 
    {
      if (flag & 1)
	{
	  darg = va_arg (ap, double);	
	  if (darg != (double)i)
	    abort();
	}
      else
	{
	  iarg = va_arg (ap, int);
	  if (iarg != i)
	    abort();
	}
    }
    va_end(ap);
}

int main (void)
{
  vafunction( "", 
	1, 2., 
	3, 4., 
	5, 6., 
	7, 8., 
	9, 10.,
	11, 12.,
	13, 14.,
	15, 16.,
	17, 18. );
  exit(0);
  return 0;
}