#define SN_NETWORK_INPUT_NUM(n) (n)->inputs_num
sn_network_t *sn_network_create (int inputs_num);
+sn_network_t *sn_network_clone (const sn_network_t *n);
void sn_network_destroy (sn_network_t *n);
int sn_network_stage_add (sn_network_t *n, sn_stage_t *s);