//	vektor.hh

class Vektor
{
 private:		// Members
   unsigned int n_;
        double *v_;

 public:		// Methods
//			Standard and (one) parameter constructor
  Vektor(const unsigned int n = 0);

//			Copy constructor
  Vektor(const Vektor &orig);

//			File constructor
  Vektor(const char filename[]);

//			Destructor
   ~Vektor();

//			vektor length
  const unsigned int& length() const
  				{ return n_; };

//			alpha * x + y
  void daxpy(const double &alpha, const Vektor &x, const Vektor &y);

//			Inner product <a,b>
  friend double InnerProd(const Vektor &a, const Vektor &b);

//			L2-norm of Vektor
  double Norm() const;

//			Assignment operator
  Vektor & operator = (const Vektor &orig);

//			Vektor * scalar
  Vektor operator * (const double &scal) const;

//			Vektor + Vektor
  Vektor operator + (const Vektor &b) const;

//			Print operator
  friend ostream & operator<<(ostream  & s, const Vektor & orig);
};