#include <iostream>

using namespace std;

class Vector
{
	float v[3];

public:

	float & operator [](int i)
	{
		return this->v[i];
	}
	
	const float & operator [](int i) const
	{
		return this->v[i];
	}
};

class Matrix
{
	Vector row[3];

public:

	float & operator ()(int r, int c)
	{
		return this->row[r][c];
	}
};



int main(void)
{
	Vector v;
	Matrix m;

	v[0] = 1.01;
	m(0,0) = 2.03;

	cout << v[0] << endl;
	cout << m(0,0);

	return 0;
}