// Boost.Units - A C++ library for zero-overhead dimensional analysis and // unit/quantity manipulation and conversion//// Copyright (C) 2003-2008 Matthias Christian Schabel// Copyright (C) 2008 Steven Watanabe//// Distributed under the Boost Software License, Version 1.0. (See// accompanying file LICENSE_1_0.txt or copy at// http://www.boost.org/LICENSE_1_0.txt)/** \file    \brief unit.cpp\detailedTest unit algebra.Output:@verbatim//[unit_outputL             = mL+L           = mL-L           = mL/L           = dimensionless meter*meter   = m^2M*(L/T)*(L/T) = m^2 kg s^-2M*(L/T)^2     = m^2 kg s^-2L^3           = m^3L^(3/2)       = m^(3/2)2vM           = kg^(1/2)(3/2)vM       = kg^(2/3)//]@endverbatim**/#include <iostream>#include "test_system.hpp"#include <boost/units/pow.hpp>int main(){    using namespace boost::units;    using namespace boost::units::test;    //[unit_snippet_1    const length                    L;    const mass                      M;    // needs to be namespace-qualified because of global time definition    const boost::units::test::time  T;    const energy                    E;    //]        std::cout << "L             = " << L << std::endl              << "L+L           = " << L+L << std::endl              << "L-L           = " << L-L << std::endl              << "L/L           = " << L/L << std::endl              << "meter*meter   = " << meter*meter << std::endl              << "M*(L/T)*(L/T) = " << M*(L/T)*(L/T) << std::endl              << "M*(L/T)^2     = " << M*pow<2>(L/T) << std::endl              << "L^3           = " << pow<3>(L) << std::endl              << "L^(3/2)       = " << pow<static_rational<3,2> >(L)              << std::endl              << "2vM           = " << root<2>(M) << std::endl              << "(3/2)vM       = " << root<static_rational<3,2> >(M)              << std::endl;    return 0;}