va_start
From cppreference.com
| Defined in header <stdarg.h>
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| void va_start( va_list ap, parmN ); |
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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.
Parameters
| ap | - | an instance of the va_list type |
| parmN | - | the named parameter preceding the first variable parameter |
Expanded value
(none)