/***********************************************************************
* M_Vector.h
*
* Header file for an implementation of mathematical vectors of doubles.
* Features overloading of basic arithmetic and comparison operators.
*
* Written by Paul Bonamy - 30 October 2009
************************************************************************/

#ifndef M_VECTOR_H
#define M_VECTOR_H

#include <iostream>
 
using namespace std;

/***********************************************************************
 * Relatively simple mathematical vector class
 ***********************************************************************/
class M_Vector {
    public:
        // constructors
        M_Vector();             // default constructor - vector of size 0
        M_Vector(int s);        // vector of given size
        M_Vector(const M_Vector &v);    // copy constructor
        M_Vector(double a[], int s);     // vector from array and size
        
        // destructor
        ~M_Vector();
        
        // support functions
        int getSize(); // returns size of vector
        
        // operators overloaded as global functions
        friend ostream& operator<< ( ostream & out, const M_Vector & v); // output operator
        
        // operators overloaded as member functions
        M_Vector& operator= ( const M_Vector & v); // assignment
        const M_Vector operator+ ( const M_Vector & v) const; // vector addition
        M_Vector operator+= ( const M_Vector & v); // vector addition
        const M_Vector operator- ( const M_Vector & v) const; // vector subtraction
        M_Vector operator-= ( const M_Vector & v); // vector subtraction
        const double operator* ( const M_Vector & v) const; // dot product
        const M_Vector operator* ( const double & d) const; // scalar multiplication
        M_Vector operator*= ( const double & d); // scalar multiplication
        const M_Vector operator/ ( const double & d) const; // scalar division
        M_Vector operator/= ( const double & d); // scalar division
        bool operator== (const M_Vector &v) const; // equality
        bool operator!= (const M_Vector &v) const; // inequality
        double & operator[]( const int & i ); // subscript
        
    private:
        double *array;      // array in which to store vector values
        int size;           // size of the vector
};

#endif