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123 lines
3.8 KiB
C++
123 lines
3.8 KiB
C++
// mcs::units - A C++ library for zero-overhead dimensional analysis and
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// unit/quantity manipulation and conversion
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//
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// Copyright (C) 2003-2007 Matthias Christian Schabel
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// Copyright (C) 2007 Steven Watanabe
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <iostream>
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#include <boost/units/base_dimension.hpp>
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#include <boost/units/derived_dimension.hpp>
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#include <boost/units/io.hpp>
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#include <boost/units/quantity.hpp>
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#include <boost/units/static_constant.hpp>
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#include <boost/units/unit.hpp>
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#include <boost/units/base_unit.hpp>
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#include <boost/units/make_system.hpp>
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namespace boost {
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namespace units {
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struct length_base_dimension : boost::units::base_dimension<length_base_dimension,1> { }; ///> base dimension of length
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struct mass_base_dimension : boost::units::base_dimension<mass_base_dimension,2> { }; ///> base dimension of mass
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struct time_base_dimension : boost::units::base_dimension<time_base_dimension,3> { }; ///> base dimension of time
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typedef length_base_dimension::type length_dimension;
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typedef mass_base_dimension::type mass_dimension;
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typedef time_base_dimension::type time_dimension;
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struct centimeter_base_unit : base_unit<centimeter_base_unit,length_dimension,1> { };
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struct gram_base_unit : base_unit<gram_base_unit,mass_dimension,2> { };
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struct second_base_unit : base_unit<second_base_unit,time_dimension,3> { };
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namespace CG {
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typedef make_system<centimeter_base_unit,
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gram_base_unit>::type system;
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/// unit typedefs
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typedef unit<dimensionless_type,system> dimensionless;
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typedef unit<length_dimension,system> length;
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typedef unit<mass_dimension,system> mass;
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/// unit constants
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BOOST_UNITS_STATIC_CONSTANT(centimeter,length);
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BOOST_UNITS_STATIC_CONSTANT(gram,mass);
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} // namespace CGS
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namespace CGS {
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typedef make_system<centimeter_base_unit,
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gram_base_unit,
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second_base_unit>::type system;
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/// unit typedefs
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typedef unit<dimensionless_type,system> dimensionless;
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typedef unit<length_dimension,system> length;
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typedef unit<mass_dimension,system> mass;
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typedef unit<time_dimension,system> time;
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/// unit constants
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BOOST_UNITS_STATIC_CONSTANT(centimeter,length);
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BOOST_UNITS_STATIC_CONSTANT(gram,mass);
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BOOST_UNITS_STATIC_CONSTANT(second,time);
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} // namespace CGS
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namespace esu {
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/// derived dimension for charge in electrostatic units : L^3/2 M^1/2 T^-1
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typedef make_dimension_list< mpl::list< dim<length_base_dimension,static_rational<3,2> >,
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dim<mass_base_dimension,static_rational<1,2> >,
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dim<time_base_dimension,static_rational<-1> > > >::type charge_dimension;
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typedef unit<charge_dimension,CGS::system> charge;
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} // namespace esu
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template<> struct base_unit_info<centimeter_base_unit>
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{
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static std::string name() { return "centimeter"; }
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static std::string symbol() { return "cm"; }
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};
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template<> struct base_unit_info<gram_base_unit>
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{
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static std::string name() { return "gram"; }
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static std::string symbol() { return "g"; }
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};
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template<> struct base_unit_info<second_base_unit>
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{
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static std::string name() { return "second"; }
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static std::string symbol() { return "s"; }
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};
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} // namespace units
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} // namespace boost
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int main(void)
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{
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using namespace boost::units;
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using namespace boost::units::CGS;
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quantity<CG::length> cg_length(1.5*CG::centimeter);
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quantity<CGS::length> cgs_length(1.5*CGS::centimeter);
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std::cout << cg_length/cgs_length << std::endl;
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//std::cout << root<2>(gram*pow<3>(centimeter)/pow<2>(second)) << std::endl;
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return 0;
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}
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