Disjoint set data structure in c-CodePudding

I want to implement the structure on the image in C language. But I have a problem because the 2 structures created call each other and therefore pose a problem how can I remedy it?

set data structure picture : Imgur link

liste set :

typedef struct liste_set
{
    set *head;
    set *tail;
} liste_set;

set :

typedef struct set set;
struct set
{
    int value;
    liste_set *liste;
    set *next;
};

Thank you for your help.

CodePudding user response：

All you have to do is have preceeding declerations so the compiler knows what set is even before you actually fully declare it.

// declare structs
struct liste_set;
struct set;

// typedef struct x to just x
typedef struct liste_set liste_set;
typedef struct set set;

// describe what the structs are
struct liste_set
{
    set *head;
    set *tail;
};

struct set
{
    int value;
    liste_set *liste;
    set *next;
};