albero_ternario

static albero<T>::ostream& albero<T>::stampa(ostream& os,typename albero<T>::nodo* p){
    if(!p){
        stampa(os,p->sx);
        stampa(os,p->cx);
        stampa(os,p->dx);
        os<<p->info<<" ";
    }

    return os;
}

template<class T>
albero<T>::ostream& albero<T>::operator<<(ostream& os,const albero<T>& r){
    stampa(os,r.radice);
    return os;
}