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69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
// Boost.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) 2003-2008 Matthias Christian Schabel
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// Copyright (C) 2008 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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/**
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\file
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\brief test_absolute.cpp
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\details
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Test absolute units.
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Output:
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@verbatim
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@endverbatim
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**/
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#include <boost/units/quantity.hpp>
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#include <boost/units/absolute.hpp>
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#include <boost/units/unit.hpp>
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#include <boost/units/make_system.hpp>
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#include <boost/units/physical_dimensions.hpp>
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#include <boost/units/base_units/si/kelvin.hpp>
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#include <boost/units/base_units/temperature/celsius.hpp>
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#include <boost/units/base_units/temperature/fahrenheit.hpp>
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#include <iostream>
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#include <boost/core/lightweight_test.hpp>
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#define BOOST_UNITS_CHECK_CLOSE(a, b) BOOST_TEST(std::abs((a) - (b)) < .0000001)
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namespace bu = boost::units;
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using bu::si::kelvin_base_unit;
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using bu::temperature::celsius_base_unit;
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using bu::temperature::fahrenheit_base_unit;
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typedef bu::unit<bu::temperature_dimension,bu::make_system<kelvin_base_unit>::type> kelvin_type;
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typedef bu::unit<bu::temperature_dimension,bu::make_system<celsius_base_unit>::type> celsius_type;
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typedef bu::unit<bu::temperature_dimension,bu::make_system<fahrenheit_base_unit>::type> fahrenheit_type;
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int main()
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{
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::absolute<fahrenheit_type> > q1(212.0 * bu::absolute<fahrenheit_type>());
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::absolute<celsius_type> > q2(0.0 * bu::absolute<celsius_type>());
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::absolute<fahrenheit_type> > q3(q2);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<fahrenheit_type> q4(q1 - q3);
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BOOST_UNITS_CHECK_CLOSE(q4.value(), 180.0);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::absolute<kelvin_type> > q5(static_cast<bu::quantity<kelvin_type> >(q4) + static_cast<bu::quantity<bu::absolute<kelvin_type> > >(q2));
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BOOST_UNITS_CHECK_CLOSE(q5.value(), 373.15);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::absolute<fahrenheit_type> > q6(q5);
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BOOST_UNITS_CHECK_CLOSE(q6.value(), 212.0);
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return boost::report_errors();
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}
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