Vectors

    Vector(int sz = 0, const T& value = T());
    Vector(const Vector& v);

    ~Vector();

    int Size() const;

    void Input(istream& in);
    void Output(ostream& out) const;
    Vector Add(const Vector& v) const;
    Vector Subtract(const Vector& v) const;
    Vector ScalarMultiply(const T& s) const;
    bool Equal(const Vector& v) const;

    Vector& Vector::operator=(const Vector& v);
    T& Vector::operator[](int pos);

    istream& operator>>(istream& in, Vector& v);
    ostream& operator<<(ostream& out, const Vector& v);

    Vector operator+(const Vector& v1, const Vector& v2);
    Vector Vector::operator-() const;
    Vector operator-(const Vector& v1, const Vector& v2);
    Vector operator*(const T& s, const Vector& v);

    bool operator==(const Vector& v1, const Vector& v2);
    bool operator!=(const Vector& v1, const Vector& v2);