va_start
va_start
Defined in header <stdarg.h> | ||
---|---|---|
void va_start( va_list ap, parmN ); |
The va_start
macro enables access to the variable arguments following the named argument parmN
.
va_start
should be invoked with an instance to a valid va_list
object ap
before any calls to va_arg
.
If parmN
is declared with register
storage class specifier, with an array type, with a function type, or with a type not compatible with the type that results from default argument promotions, the behavior is undefined.