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example.c
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	// This file is part of Eigen, a lightweight C++ template library
	// for linear algebra.
	//
	// Copyright (C) 2009 Benoit Jacob <jacob.benoit.1@gmail.com>
	//
	// This Source Code Form is subject to the terms of the Mozilla
	// Public License v. 2.0. If a copy of the MPL was not distributed
	// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

	#include "binary_library.h"
	#include "stdio.h"

	void demo_MatrixXd()
	{
	struct C_MatrixXd matrix1, matrix2, *result;
	printf("* demo_MatrixXd *\n");

	matrix1 = MatrixXd_new(3, 3);
	MatrixXd_set_zero(matrix1);
	MatrixXd_set_coeff(matrix1, 0, 1, 2.5);
	MatrixXd_set_coeff(matrix1, 1, 0, 1.4);
	printf("Here is matrix1:\n");
	MatrixXd_print(matrix1);

	matrix2 = MatrixXd_new(3, 3);
	MatrixXd_multiply(matrix1, matrix1, matrix2);
	printf("Here is matrix1*matrix1:\n");
	MatrixXd_print(matrix2);

	MatrixXd_delete(matrix1);
	MatrixXd_delete(matrix2);
	}

	// this helper function takes a plain C array and prints it in one line
	void print_array(double *array, int n)
	{
	struct C_Map_MatrixXd *m = Map_MatrixXd_new(array, 1, n);
	Map_MatrixXd_print(m);
	Map_MatrixXd_delete(m);
	}

	void demo_Map_MatrixXd()
	{
	struct C_Map_MatrixXd *map;
	double array[5];
	int i;
	printf("* demo_Map_MatrixXd *\n");

	for(i = 0; i < 5; ++i) array[i] = i;
	printf("Initially, the array is:\n");
	print_array(array, 5);

	map = Map_MatrixXd_new(array, 5, 1);
	Map_MatrixXd_add(map, map, map);
	Map_MatrixXd_delete(map);

	printf("Now the array is:\n");
	print_array(array, 5);
	}

	int main()
	{
	demo_MatrixXd();
	demo_Map_MatrixXd();
	}