73ef4ff3
 Hu Chunming
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// 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 temperature.cpp
\details
Conversions between Fahrenheit and Kelvin for absolute temperatures and
temperature differences.
Output:
@verbatim
//[ temperature_output_1
{ 32 } F
{ 273.15 } K
{ 273.15 } K
[ 32 ] F
[ 17.7778 ] K
[ 17.7778 ] K
//]
@endverbatim
**/
#include <iomanip>
#include <iostream>
#include <boost/units/absolute.hpp>
#include <boost/units/get_system.hpp>
#include <boost/units/io.hpp>
#include <boost/units/unit.hpp>
#include <boost/units/quantity.hpp>
#include <boost/units/systems/si/temperature.hpp>
#include <boost/units/detail/utility.hpp>
#include <boost/units/base_units/temperature/fahrenheit.hpp>
using namespace boost::units;
namespace boost {
namespace units {
namespace fahrenheit {
//[temperature_snippet_1
typedef temperature::fahrenheit_base_unit::unit_type temperature;
typedef get_system<temperature>::type system;
BOOST_UNITS_STATIC_CONSTANT(degree,temperature);
BOOST_UNITS_STATIC_CONSTANT(degrees,temperature);
//]
} // fahrenheit
} // namespace units
} // namespace boost
int main()
{
//[temperature_snippet_3
quantity<absolute<fahrenheit::temperature> > T1p(
32.0*absolute<fahrenheit::temperature>());
quantity<fahrenheit::temperature> T1v(
32.0*fahrenheit::degrees);
quantity<absolute<si::temperature> > T2p(T1p);
quantity<si::temperature> T2v(T1v);
//]
typedef conversion_helper<
quantity<absolute<fahrenheit::temperature> >,
quantity<absolute<si::temperature> > > absolute_conv_type;
typedef conversion_helper<
quantity<fahrenheit::temperature>,
quantity<si::temperature> > relative_conv_type;
std::cout << T1p << std::endl
<< absolute_conv_type::convert(T1p) << std::endl
<< T2p << std::endl
<< T1v << std::endl
<< relative_conv_type::convert(T1v) << std::endl
<< T2v << std::endl
<< std::endl;
return 0;
}
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