test_intervals.cxx

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#include <boost/numeric/interval.hpp>
#include <iostream>

template<class T, class Policies>
std::ostream &operator<<(std::ostream &os,
                         const boost::numeric::interval<T, Policies> &x) {
  os << "[" << x.lower() << ", " << x.upper() << "]";
  return os;
}

using namespace std;
int main () {

     typedef boost::numeric::interval<double> I;
     I a = 42.0, b{5.0, 7.0};
     I c = a/b;

     cout << a << " / " << b << " = " << c << endl;

    return 0;
}