Liste dublu inlantuite

        LISTE DUBLU INLANTUITE

    struct nodl {
            tip_informatie inf;
            nodl*ant,*urm;
                }
    nodl *prim,*ultim;
    CREARE:

    void adauga(nodl*&prim,nodl*&ultim,tip_informatie x)
    {
        if(prim==NULL)
        {
        prim = new nodl;
        prim->inf = x;
        prim->urm=NULL;
        prim->ant=NULL;
        ultim=prim;
        }
        else
        {
        nodl *p;
        p=new nodl;
        p->inf=x;
        p->urm=NULL;
        p->ant=ultim;
        ultim->urm=p;
        ultim=p;
        }
    }

    AFISARE:

    void afis(nodl*prim)
    {
    nodl *p;
    p=prim;
    while(p!=NULL)
    {
    cout << p->inf;
    p=p->urm;
    }
    }