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50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
/* Boost example/rational.cpp
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* example program of how to use interval< rational<> >
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*
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* Copyright Sylvain Pion, Guillaume Melquiond 2002-2003
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* Permission to use, copy, modify, sell, and distribute this software
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* is hereby granted without fee provided that the above copyright notice
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* appears in all copies and that both that copyright notice and this
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* permission notice appear in supporting documentation.
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*
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* None of the above authors make any representation about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* $Id$
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*/
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// it would have been enough to only include:
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// <boost/numeric/interval.hpp>
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// but it's a bit overkill to include processor intrinsics
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// and transcendental functions, so we do it by ourselves
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#include <boost/numeric/interval/interval.hpp> // base class
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#include <boost/numeric/interval/rounded_arith.hpp> // default arithmetic rounding policy
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#include <boost/numeric/interval/checking.hpp> // default checking policy
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#include <boost/numeric/interval/arith.hpp> // += *= -= etc
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#include <boost/numeric/interval/policies.hpp> // default policy
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#include <boost/rational.hpp>
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#include <iostream>
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typedef boost::rational<int> Rat;
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typedef boost::numeric::interval<Rat> Interval;
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std::ostream& operator<<(std::ostream& os, const Interval& r) {
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os << "[" << r.lower() << "," << r.upper() << "]";
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return os;
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}
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int main() {
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Rat p(2, 3), q(3, 4);
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Interval z(4, 5);
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Interval a(p, q);
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a += z;
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z *= q;
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a -= p;
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a /= q;
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std::cout << z << std::endl;
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std::cout << a << std::endl;
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}
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