DoubleMatrix2x2.hpp
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	/*
	* DoubleMatrix2x2.hpp
	*
	* Created on: Oct 21, 2012
	* Author: radu
	*/

	#ifndef DOUBLEMATRIX2X2_HPP_
	#define DOUBLEMATRIX2X2_HPP_

	#include <iostream>

	class DoubleMatrix2x2 {
	public:
	// Empty constructor
	DoubleMatrix2x2();

	// Alternate constructor
	DoubleMatrix2x2(const double m11, const double m12, const double m21,
	const double m22);

	// Copy constructor
	DoubleMatrix2x2(const DoubleMatrix2x2 &m);

	// Destructor
	virtual ~DoubleMatrix2x2();

	// Get methods
	double Get(const int i, const int j) const;

	// Operators
	DoubleMatrix2x2 &operator=(const DoubleMatrix2x2 &m);
	DoubleMatrix2x2 operator-() const;
	DoubleMatrix2x2 operator+(const DoubleMatrix2x2 &m) const;
	DoubleMatrix2x2 operator-(const DoubleMatrix2x2 &m) const;

	// Other public methods
	void Multiply(const double d);
	double Determinant() const;
	DoubleMatrix2x2 Inverse() const;

	// Friends
	friend std::ostream &operator<<(std::ostream &output,
	const DoubleMatrix2x2 &z);

	private:
	// Private data members
	// We can store the data members as a 1D array:
	// M[i][j] = mMatrix[2 * i + j]
	double mMatrix[4];
	};

	#endif /* DOUBLEMATRIX2X2_HPP_ */