Problem in struct when creating structure c

Question

why am I getting error Genre genre; part. It says ‘Genre’ does not name a type Can somebody explain?

// The structure of the Song
typedef struct song
{
    int id_playlist;
    char *artist;
    Genre genre;
    double duration;
    char *name;
    struct song *next;
} Song;


// Enumeration for song genre
typedef enum 
{
    ROCK = 0,
    RAP,
    POP,
    METAL
} Genre;


Song *New_song(char *name, char *artist, double duration, Genre genre);
void Print_song(Song *song);

Hint: Declare it before you use it. Compilers can only work with what they've seen up to that point. They don't look into the future. — tadman
– tadman, Commented May 30, 2021 at 15:31
Treat it like telling the compiler a story. You can't involve characters you haven't introduced yet, or it's going to ask "Wait, who's this new person?" — tadman
– tadman, Commented May 30, 2021 at 15:41

Vincent Fourmond · Accepted Answer · 2021-05-30 15:34:25Z

2

When the compiler reads the Genre genre; line in the structure definition, it hasn't interpreted yet the definition of Genre below. If you swap both, this should work fine:

// Enumeration for song genre
typedef enum 
{
    ROCK = 0,
    RAP,
    POP,
    METAL
} Genre;

// The structure of the Song
typedef struct song
{
    int id_playlist;
    char *artist;
    Genre genre;
    double duration;
    char *name;
    struct song *next;
} Song;

In other words, you have to define something before you can use it.

answered May 30, 2021 at 15:34

Vincent Fourmond

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