#include <varargs.h>
type va_arg(va_list ap, type);
Description
va_arg returns the next unprocessed value from a variable
argument list ap (which you must previously create with
va_start). Specify the type for the value as the second parameter
to the macro, type.
Returns
va_arg returns the next argument, an object of type type.
Portability
The va_arg defined in varargs.h has the same syntax and
usage as the ANSI C version from stdarg.h.