Help with Classes and Arrays(Math Matrix)

#ifndef _MATRIX3_H_
#define _MATRIX3_H_


class Matrix3
{
private: 
	float values[3][3];

public:
	Matrix3(float v=1.0f); // Initialize diagonal to some value, default to 1.0

	Matrix3(float v11,float v12,float v13,
	float v21,float v22,float v23,
	float v31,float v32,float v33);

	void Identity(); // Create an identity matrix

	void SetValue(short row,short column,float v); // 0 based index
	float GetValue(short row,short column); // 0 based index

	Matrix3 Add(Matrix3 &);
	Matrix3 Subtract(Matrix3 &);
	Matrix3 Multiply(Matrix3 &);

	void Print(ostream &); // Print the matrix nicely to the console
};

#endif

Matrix3 mTest;
Matrix3 mAdd(2.0f);
Matrix3 mSubtract(3.0f);
Matrix3 mMultiply(4.0f);
Matrix3 mResult;

	//
	// Default matrix should have a 1.0 for the diagonal
	cout << "Default Matrix..." << endl;
	mTest.Print(cout);
	cout << endl;

	//
	// Add a couple of matrices
	cout << "Adding two matrices..." << endl;
	mResult=mAdd.Add(mTest);
	mResult.Print(cout);
	cout << endl;

	//
	// Subtract a couple of matrices
	cout << "Subtracting two matrices..." << endl;
	mResult=mSubtract.Subtract(mTest);
	mResult.Print(cout);
	cout << endl;

	//
	// Multiply a couple of matrices
	cout << "Multiplying two matrices..." << endl;
	mResult=mMultiply.Multiply(mAdd);
	mResult.Print(cout);
	cout << endl;

return 0;
}