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/test/minimal.hpp>
36
37 #define BOOST_UNITS_CHECK_CLOSE(a, b) (BOOST_CHECK((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
test_main(int,char * [])50 int test_main(int,char *[])
51 {
52 bu::quantity<bu::absolute<fahrenheit_type> > q1(212.0 * bu::absolute<fahrenheit_type>());
53 bu::quantity<bu::absolute<celsius_type> > q2(0.0 * bu::absolute<celsius_type>());
54 bu::quantity<bu::absolute<fahrenheit_type> > q3(q2);
55 bu::quantity<fahrenheit_type> q4(q1 - q3);
56
57 BOOST_UNITS_CHECK_CLOSE(q4.value(), 180.0);
58
59 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 bu::quantity<bu::absolute<fahrenheit_type> > q6(q5);
64
65 BOOST_UNITS_CHECK_CLOSE(q6.value(), 212.0);
66
67 return(0);
68 }
69