how to copy the value of a node in a tree into another variable

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C

I have been working on this project that displays a binary tree in its real shape and to to do
that I am trying to copy the entire tree into a spacial liked list where i keep information about each node its value ,is it a leave or not ?,what is its level ..in order to print it conveniently
but the problem is that i cant copy the value of a node into the liked list's node
i tried to use another variable but it just wont work
here is a sample of the code :

void const_llc_arbre(noeud *racine,maillon**tete,int *cpt,maillon **q)
{
                 maillon *p;(node)(the node of the linked list)
                 allouer(&p);
                 int valeur;/** its in french !**/(value)
                 valeur=racine->info;(node->value)
                 p->val=valeur;
                 p->suiv=NULL;
                 p->niv=profondeur(racine);(the level of the node)
                if(*cpt==0){*tete=p;}(head of liked list)
                else
                {
                                (*q)->suiv=p;(next)
                }
                *q=p;
                (*cpt)++;
                const_llc_arbre(racine->fd,&(*tete),&(*cpt),&(*q));(right son)
                const_llc_arbre(racine->fg,&(*tete),&(*cpt),&(*q));(left son)
}