Class vector redefine

#define vDIM 2

template<typename T>
class V2 : public Vector<T, vDIM> {
public:
    V2(T x, T y) {
        Vector<T, vDIM>::operator[](0) = x;
        Vector<T, vDIM>::operator[](1) = y;
    }

    T x(){ return Vector<T, vDIM>::operator[](0);}
    void x(T ix){ Vector<T, vDIM>::operator[](0) = ix;}
    T y(){ return Vector<T, vDIM>::operator[](1);}
    void y(T iy){ Vector<T, vDIM>::operator[](1) = iy;}
};

typedef V2<double> V2d;

#define vDIM 3

template<typename T>
class V3 : public Vector<T, vDIM> {
public:
    V3(T x, T y, T z) {
        Vector<T, vDIM>::operator[](0) = x;
        Vector<T, vDIM>::operator[](1) = y;
        Vector<T, vDIM>::operator[](1) = z;
    }

    T x(){ return Vector<T, vDIM>::operator[](0);}
    void x(T ix){ Vector<T, vDIM>::operator[](0) = ix;}
    T y(){ return Vector<T, vDIM>::operator[](1);}
    void y(T iy){ Vector<T, vDIM>::operator[](1) = iy;}
    T z(){ return Vector<T, vDIM>::operator[](1);}
    void z(T iz){ Vector<T, vDIM>::operator[](1) = iz;}

};template<typename T>