FAdaugareInceputLLDI

void AdaugareInceput(nod * & prim , nod * & ultim, int x)
{
    nod* aux = new nod;
    aux->info = x;
    aux->ant = NULL;
    if(prim == NULL)
    {
        aux->pre = NULL;
        prim = aux;
        ultim = prim;
    }
    else
    {
        aux->pre = prim;
        prim = aux;
    }
}