#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;

#ifndef _VECTOR_HPP_
#define _VECTOR_HPP_

class Vector {
  int *array;
  int size;
  
public:
  Vector(unsigned int length=0);
  Vector(const Vector &v);
  Vector(const Vector *v);
  ~Vector();
  unsigned int length() const;     // return Vector's length.
  int& valueAt(unsigned int pos);  // return a reference to element at position pos
  
  int find(int a) const;           // check if 'a' exists in Vector. Return the position
                                   // If found, return the position of the element.
                                   // Otherwise, return -1
  
  void print() const;              // print to standard output vector values
  void print(string &msg) const;   // print to standard output msg and vector values 
  Vector& operator=(const Vector &v);
  
  int operator+() const;           // returns the sum of Vector elements
  friend int operator*(const Vector&) ;  // returns the product of Vector elements
  
  Vector operator-() const;        // returns a new Vector, containing the negative
                                   // values of the original vector.
  Vector& operator++();            // prefix increment. Returns reference to the existing vector.
  friend Vector& operator--(Vector&);    // prefix decrement. Returns reference to the existing vector.
  Vector operator++(int );         // postfix increment. Returns a new Vector.
  friend Vector operator--(Vector&, int);  // postfix decrement. Returns a new Vector.
  
  Vector operator~() const;        // returns the binary NOT for each element in a new Vector
  friend Vector operator!(const Vector &v);  // returns a copy of the Vector with 
                                             // elements in inverted sequence.
};

#endif