11 class Vector:public Object {

    11 namespace algebra {

    12   public:

    12     class Vector:public Object {

    13     enum Mode { DEG, RAD, GRAD };

    13       public:

    14         enum Mode { DEG, RAD, GRAD };

    15     Vector (int xx = 0, int yy = 0);

    16         Vector (int xx = 0, int yy = 0);

    16     virtual ~ Vector ();

    17         virtual ~ Vector ();

    18     int X ();

    19         int X ();

    19     int Y ();

    20         int Y ();

    21     Vector operator+ (Vector&);

    22         Vector operator+ (Vector &);

    22     Vector operator- (Vector&);

    23         Vector operator- (Vector &);

    23     double abs ();

    24         double abs ();

    25     void vector ();

    26         void vector ();

    26     double angle (Vector&);

    27         double angle (Vector &);

    27     void setMode (Mode m = RAD);

    28         void setMode (Mode m = RAD);

    29   private:

    30       private:

    30     Mode mode;

    31         Mode mode;

    31     int x;

    32         int x;

    32     int y;

    33         int y;

    33 };

    34     };

    35 }