/*

 * Copyright 2011 Steven Gribble

 *

 *  This file is the solution to an exercise problem posed during

 *  one of the UW CSE 333 lectures (333exercises).

 *

 *  333exercises is free software: you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation, either version 3 of the License, or

 *  (at your option) any later version.

 *

 *  333exercises is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with 333exercises.  If not, see <http://www.gnu.org/licenses/>.

 */



// lec 10 exercise 1



#ifndef _THREEDPOINT_H_

#define _THREEDPOINT_H_



#include <iostream>



using namespace std;



// A "ThreeDPoint" is a class representing a three-dimensional point.

// Internally, a ThreeDPoint is represented with doubles for the x, y,

// and z axis values.

class ThreeDPoint {

 public:



  // Constructors; we use initialization lists to initialize.

  ThreeDPoint() : x_(0), y_(0), z_(0) { }

  ThreeDPoint(const double x, const double y, const double z)

    : x_(x), y_(y), z_(z) { }



  // Copy constructor.

  ThreeDPoint(const ThreeDPoint &pt);



  // Accessors (inlined).

  double get_x() const { return x_; }

  double get_y() const { return y_; }

  double get_z() const { return z_; }



  // Inner product.

  double InnerProduct(const ThreeDPoint &pt) const;



  // Add, subtract operators.

  ThreeDPoint operator+(const ThreeDPoint &pt) const;

  ThreeDPoint operator-(const ThreeDPoint &pt) const;



  // Add/subtract and assign operators.

  ThreeDPoint &operator+=(const ThreeDPoint &pt);

  ThreeDPoint &operator-=(const ThreeDPoint &pt);



  // Assignment operator.

  ThreeDPoint &operator=(const ThreeDPoint &pt);



  // Override "<<" for std::ostream.

  friend ostream &operator<<(ostream &out, const ThreeDPoint &pt);



 private:

  double x_, y_, z_;

};



#endif  // _THREEDPOINT_H_