Crearea listelor (3 cazuri)

//Cand se cunoaste numarul de noduri

    int n,info;
    cout<<"Nr de noduri: "; cin>>n;
    cout<<"Info: "; cin>>info;
    nod *p=new nod;
    p->info=info;
    nod *prim=p;

    for(int i=1;i<=n-1;i++)
    {
        nod *q=new nod;
        cout<<"Info: "; cin>>info;
        q->info=info;
        p->urmator=q;
        p=q;
    }

//Cand citirea se opreste la intalnirea unei anumite valori (de exemplu 0) - ITERATIVA

nod *creare()
{
    int n;
    cin>>n;
    if(n==0) return 0;
    else
    {
        nod* p=new nod;
        p->info=n;
        nod *prim=p;
        cin>>n;
        while(n)
        {
            nod *q=new nod;
            q->info=n;
            p->urmator=q;
            p=q;
            cin>>n;
        }
        p->urmator=NULL;
        return prim;
    }
}

//Cand citirea se opreste la intalnirea unei anumite valori (de exemplu 0) - RECURSIVA

-

//Cand citirea informatiilor memorate in noduri se face din fisier

    int n,info;
    ifstream f("date.in");
    cout<<"Nr de noduri: "; f>>n;
    cout<<"Info: "; f>>info;
    nod *p=new nod;
    p->info=info;
    nod *prim=p;

    for(int i=1;i<=n-1;i++)
    {
        nod *q=new nod;
        cout<<"Info: "; f>>info;
        q->info=info;
        p->urmator=q;
        p=q;
    }