From: matthiasschabel_at_[hidden]
Date: 2007-06-06 01:16:39
Author: matthiasschabel
Date: 2007-06-06 01:16:39 EDT (Wed, 06 Jun 2007)
New Revision: 4467
URL: http://svn.boost.org/trac/boost/changeset/4467
Log:
for tutorial code
Added:
sandbox/units/libs/units/tutorial/
sandbox/units/libs/units/tutorial/tutorial_1.cpp
Added: sandbox/units/libs/units/tutorial/tutorial_1.cpp
==============================================================================
--- (empty file)
+++ sandbox/units/libs/units/tutorial/tutorial_1.cpp 2007-06-06 01:16:39 EDT (Wed, 06 Jun 2007)
@@ -0,0 +1,122 @@
+// mcs::units - A C++ library for zero-overhead dimensional analysis and
+// unit/quantity manipulation and conversion
+//
+// Copyright (C) 2003-2007 Matthias Christian Schabel
+// Copyright (C) 2007 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)
+
+#include <iostream>
+
+#include <boost/units/base_dimension.hpp>
+#include <boost/units/derived_dimension.hpp>
+#include <boost/units/io.hpp>
+#include <boost/units/quantity.hpp>
+#include <boost/units/static_constant.hpp>
+#include <boost/units/unit.hpp>
+#include <boost/units/base_unit.hpp>
+#include <boost/units/make_system.hpp>
+
+namespace boost {
+
+namespace units {
+
+struct length_base_dimension : boost::units::base_dimension<length_base_dimension,1> { }; ///> base dimension of length
+struct mass_base_dimension : boost::units::base_dimension<mass_base_dimension,2> { }; ///> base dimension of mass
+struct time_base_dimension : boost::units::base_dimension<time_base_dimension,3> { }; ///> base dimension of time
+
+typedef length_base_dimension::type length_dimension;
+typedef mass_base_dimension::type mass_dimension;
+typedef time_base_dimension::type time_dimension;
+
+struct centimeter_base_unit : base_unit<centimeter_base_unit,length_dimension,1> { };
+struct gram_base_unit : base_unit<gram_base_unit,mass_dimension,2> { };
+struct second_base_unit : base_unit<second_base_unit,time_dimension,3> { };
+
+namespace CG {
+
+typedef make_system<centimeter_base_unit,
+ gram_base_unit>::type system;
+
+/// unit typedefs
+typedef unit<dimensionless_type,system> dimensionless;
+
+typedef unit<length_dimension,system> length;
+typedef unit<mass_dimension,system> mass;
+
+/// unit constants
+BOOST_UNITS_STATIC_CONSTANT(centimeter,length);
+BOOST_UNITS_STATIC_CONSTANT(gram,mass);
+
+} // namespace CGS
+
+namespace CGS {
+
+typedef make_system<centimeter_base_unit,
+ gram_base_unit,
+ second_base_unit>::type system;
+
+/// unit typedefs
+typedef unit<dimensionless_type,system> dimensionless;
+
+typedef unit<length_dimension,system> length;
+typedef unit<mass_dimension,system> mass;
+typedef unit<time_dimension,system> time;
+
+/// unit constants
+BOOST_UNITS_STATIC_CONSTANT(centimeter,length);
+BOOST_UNITS_STATIC_CONSTANT(gram,mass);
+BOOST_UNITS_STATIC_CONSTANT(second,time);
+
+} // namespace CGS
+
+namespace esu {
+
+/// derived dimension for charge in electrostatic units : L^3/2 M^1/2 T^-1
+typedef make_dimension_list< mpl::list< dim<length_base_dimension,static_rational<3,2> >,
+ dim<mass_base_dimension,static_rational<1,2> >,
+ dim<time_base_dimension,static_rational<-1> > > >::type charge_dimension;
+
+typedef unit<charge_dimension,CGS::system> charge;
+
+} // namespace esu
+
+template<> struct base_unit_info<centimeter_base_unit>
+{
+ static std::string name() { return "centimeter"; }
+ static std::string symbol() { return "cm"; }
+};
+
+template<> struct base_unit_info<gram_base_unit>
+{
+ static std::string name() { return "gram"; }
+ static std::string symbol() { return "g"; }
+};
+
+template<> struct base_unit_info<second_base_unit>
+{
+ static std::string name() { return "second"; }
+ static std::string symbol() { return "s"; }
+};
+
+} // namespace units
+
+} // namespace boost
+
+int main(void)
+{
+ using namespace boost::units;
+ using namespace boost::units::CGS;
+
+ quantity<CG::length> cg_length(1.5*CG::centimeter);
+ quantity<CGS::length> cgs_length(1.5*CGS::centimeter);
+
+ std::cout << cg_length/cgs_length << std::endl;
+
+ //std::cout << root<2>(gram*pow<3>(centimeter)/pow<2>(second)) << std::endl;
+
+ return 0;
+}
+