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1 | /* Boost example/rational.cpp |
2 | * example program of how to use interval< rational<> > | |
3 | * | |
4 | * Copyright 2002-2003 Guillaume Melquiond, Sylvain Pion | |
5 | * | |
6 | * Distributed under the Boost Software License, Version 1.0. | |
7 | * (See accompanying file LICENSE_1_0.txt or | |
8 | * copy at http://www.boost.org/LICENSE_1_0.txt) | |
9 | */ | |
10 | ||
11 | // it would have been enough to only include: | |
12 | // <boost/numeric/interval.hpp> | |
13 | // but it's a bit overkill to include processor intrinsics | |
14 | // and transcendental functions, so we do it by ourselves | |
15 | ||
16 | #include <boost/numeric/interval/interval.hpp> // base class | |
17 | #include <boost/numeric/interval/rounded_arith.hpp> // default arithmetic rounding policy | |
18 | #include <boost/numeric/interval/checking.hpp> // default checking policy | |
19 | #include <boost/numeric/interval/arith.hpp> // += *= -= etc | |
20 | #include <boost/numeric/interval/policies.hpp> // default policy | |
21 | ||
22 | #include <boost/rational.hpp> | |
23 | #include <iostream> | |
24 | ||
25 | typedef boost::rational<int> Rat; | |
26 | typedef boost::numeric::interval<Rat> Interval; | |
27 | ||
28 | std::ostream& operator<<(std::ostream& os, const Interval& r) { | |
29 | os << "[" << r.lower() << "," << r.upper() << "]"; | |
30 | return os; | |
31 | } | |
32 | ||
33 | int main() { | |
34 | Rat p(2, 3), q(3, 4); | |
35 | Interval z(4, 5); | |
36 | Interval a(p, q); | |
37 | a += z; | |
38 | z *= q; | |
39 | a -= p; | |
40 | a /= q; | |
41 | std::cout << z << std::endl; | |
42 | std::cout << a << std::endl; | |
43 | } |