1//
2// Units.cpp
3//
4// This sample demonstrates the Units.
5//
6// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
7// and Contributors.
8//
9// SPDX-License-Identifier: BSL-1.0
10//
11
12
13#include "Poco/Util/Units.h"
14#include <iostream>
15
16
17using namespace Poco::Util::Units::Values;
18using namespace Poco::Util::Units::Constants;
19
20
21using Poco::Util::Units::square;
22using Poco::Util::Units::cube;
23
24
25namespace Poco {
26namespace Util {
27namespace Units {
28namespace Units {
29typedef Compose<Scale<N, 1, 1000>, Power<m, -3> > SpecificWeight;// [kN/m^3]
30} // namespace Units
31namespace Values {
32typedef Value<double, Units::SpecificWeight> SpecificWeight;
33} } } } // namespace Poco::Util::Units
34
35
36int main()
37{
38 std::cout << "One mile is " << km(mile(1)) << std::endl;
39 // Output: One mile is 1.60934 km
40
41 std::cout << "Flow rate is " << m3(mile(1)*inch(80)*foot(9))/s(minute(5)) << std::endl;
42 // Output: Flow rate is 29.9026 (m)^3.(s)^-1
43
44 hour h;
45 //h = cm(3); // Compile-time error: incompatible units
46 //h = 4; // Compile-time error: 4 of what?
47 h = day(4); // Ok: h is 96 hours
48
49 m l = cm(42);
50 std::cout << cm(42) << " == " << l << " == " << milli(l) << std::endl;
51 std::cout << "Area of circle with radius " << l <<
52 " is " << mm2(square(l) * pi) << std::endl;
53
54 SpecificWeight sw(9.81); // water
55
56 std::cout << "Volume of a water cube with side size " << m(0.1) <<
57 " is " << liter(cube(m(0.1))) <<
58 " and weighs " << N(sw * cube(m(.1))) << std::endl;
59
60 m radius_equator(6378135);
61 m radius_pole(6356750);
62 m3 vol((pi * square(radius_equator) * radius_pole) * 4/3);
63
64 std::cout << "Volume of Earth is " << vol
65 << " (" << yotta(liter(vol)) << ")" << std::endl;
66 std::cout << "It takes " << minute(AU/c) << " for a Sun beam to reach Earth." << std::endl;
67
68
69 std::cout << std::endl << m(1) << " is:" << std::endl;
70 std::cout << "-------------" << std::endl;
71
72 std::cout << deca(m(1)) << std::endl;
73 std::cout << hecto(m(1)) << std::endl;
74 std::cout << kilo(m(1)) << std::endl;
75 std::cout << mega(m(1)) << std::endl;
76 std::cout << giga(m(1)) << std::endl;
77 std::cout << tera(m(1)) << std::endl;
78 std::cout << peta(m(1)) << std::endl;
79 std::cout << exa(m(1)) << std::endl;
80 std::cout << zetta(m(1)) << std::endl;
81 std::cout << yotta(m(1)) << std::endl;
82
83 std::cout << deci(m(1)) << std::endl;
84 std::cout << centi(m(1)) << std::endl;
85 std::cout << milli(m(1)) << std::endl;
86 std::cout << micro(m(1)) << std::endl;
87 std::cout << nano(m(1)) << std::endl;
88 std::cout << pico(m(1)) << std::endl;
89 std::cout << femto(m(1)) << std::endl;
90 std::cout << atto(m(1)) << std::endl;
91 std::cout << zepto(m(1)) << std::endl;
92 std::cout << yocto(m(1)) << std::endl;
93
94 return 0;
95}
96