#include struct song_info_t { const char *artist; const char *name; uint32_t year; }; struct radio_station_info_t { const char *name; song_info_t *songs; uint32_t n_songs; uint32_t id; }; void radio_stations_init(void); uint32_t n_radio_stations(void); const radio_station_info_t *get_radio_stations(uint32_t id);