14.2.3 Extract a value from argument list

Synopsis

#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.