DoubleMatrix2x2.hpp
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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_ */