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class AA
{
public:
    AA();
    int A_Nummer = 0;
    QString AA_Text ="";
    QList <BB> bb;
    BB b_b;
};

class BB
{
public:
    BB();
    int B_Nummer = 0;
    QString BB_Text ="312";
};

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

    QList <AA> aa;
    AA a_a;

private:
    Ui::MainWindow *ui;
};


MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    aa.begin();
    int a = 0;
    int b = 0;
    int c = 0;
    int j = 0;
    QString line;
    for (j = 0; j < 10; j++)
    {
        a_a.A_Nummer = j;
        a_a.AA_Text = QString("AA = %1").arg(j);

        a_a.bb.begin();
        a_a.bb.clear();
        for (a = 0; a <= j; a++)
        {
            a_a.b_b.B_Nummer = a;
            a_a.b_b.BB_Text = QString("BB = %1").arg(a);
            a_a.bb.append(a_a.b_b);
        }
        a_a.bb.end();
        aa.append(a_a);
    }
    aa.end();

    QList <AA> :: iterator itr;
    QList <BB> :: iterator itr1;
    for (itr = aa.begin();itr != aa.end() ; ++itr)
    {
        c = 0;
        for (itr1 = a_a.bb.begin(); itr1 != a_a.bb.end(); ++itr1 )
        {
            qDebug () << QString ("A = %1").arg(a_a.A_Nummer);
            qDebug () << QString ("B = %1").arg(a_a.b_b.B_Nummer);
            line = QString ("AA = %1 , BB = %2").arg(b).arg(c++) ;
            qDebug ()<< line;
        }
        b++;
    }
}