#include <nng/nng.h>
void *nng_aio_get_output(nng_aio *aio, unsigned int index);| This documentation is for version v1.7.3 of NNG, but the latest released version is v1.10.0. see the documentation for v1.10.0 for the most up-to-date information. | 
nng_aio_get_output(3)
NAME
nng_aio_get_output - return output result
SYNOPSIS
DESCRIPTION
The nng_aio_get_output() function returns the output result at index
resulting from the asynchronous operation associated with aio.
The type and semantics of output parameters are determined by specific operations.
| If the index does not correspond to a defined output for the operation,
or the operation did not succeed, then the return value will be NULL. | 
| It is an error to call this function while the aio is currently in use by an active asynchronous operation, or if no operation has been performed using the aio yet. | 
RETURN VALUES
The indexth result of the operation, or NULL.
ERRORS
None.