1 | // Boost.Units - A C++ library for zero-overhead dimensional analysis and |
---|---|
2 | // unit/quantity manipulation and conversion |
3 | // |
4 | // Copyright (C) 2003-2008 Matthias Christian Schabel |
5 | // Copyright (C) 2008 Steven Watanabe |
6 | // |
7 | // Distributed under the Boost Software License, Version 1.0. (See |
8 | // accompanying file LICENSE_1_0.txt or copy at |
9 | // http://www.boost.org/LICENSE_1_0.txt) |
10 | |
11 | /** |
12 | \file |
13 | |
14 | \brief test_absolute.cpp |
15 | |
16 | \details |
17 | Test absolute units. |
18 | |
19 | Output: |
20 | @verbatim |
21 | @endverbatim |
22 | **/ |
23 | |
24 | #include <boost/units/quantity.hpp> |
25 | #include <boost/units/absolute.hpp> |
26 | #include <boost/units/unit.hpp> |
27 | #include <boost/units/make_system.hpp> |
28 | #include <boost/units/physical_dimensions.hpp> |
29 | #include <boost/units/base_units/si/kelvin.hpp> |
30 | #include <boost/units/base_units/temperature/celsius.hpp> |
31 | #include <boost/units/base_units/temperature/fahrenheit.hpp> |
32 | |
33 | #include <iostream> |
34 | |
35 | #include <boost/core/lightweight_test.hpp> |
36 | |
37 | #define BOOST_UNITS_CHECK_CLOSE(a, b) BOOST_TEST(std::abs((a) - (b)) < .0000001) |
38 | |
39 | namespace bu = boost::units; |
40 | using bu::si::kelvin_base_unit; |
41 | using bu::temperature::celsius_base_unit; |
42 | using bu::temperature::fahrenheit_base_unit; |
43 | |
44 | typedef bu::unit<bu::temperature_dimension,bu::make_system<kelvin_base_unit>::type> kelvin_type; |
45 | |
46 | typedef bu::unit<bu::temperature_dimension,bu::make_system<celsius_base_unit>::type> celsius_type; |
47 | |
48 | typedef bu::unit<bu::temperature_dimension,bu::make_system<fahrenheit_base_unit>::type> fahrenheit_type; |
49 | |
50 | int main() |
51 | { |
52 | BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::absolute<fahrenheit_type> > q1(212.0 * bu::absolute<fahrenheit_type>()); |
53 | BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::absolute<celsius_type> > q2(0.0 * bu::absolute<celsius_type>()); |
54 | BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::absolute<fahrenheit_type> > q3(q2); |
55 | BOOST_CONSTEXPR_OR_CONST bu::quantity<fahrenheit_type> q4(q1 - q3); |
56 | |
57 | BOOST_UNITS_CHECK_CLOSE(q4.value(), 180.0); |
58 | |
59 | 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)); |
60 | |
61 | BOOST_UNITS_CHECK_CLOSE(q5.value(), 373.15); |
62 | |
63 | BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::absolute<fahrenheit_type> > q6(q5); |
64 | |
65 | BOOST_UNITS_CHECK_CLOSE(q6.value(), 212.0); |
66 | |
67 | return boost::report_errors(); |
68 | } |
69 |