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- ///////////////////////////////////////////////////////////////
- // Copyright 2011 John Maddock. Distributed under the Boost
- // Software License, Version 1.0. (See accompanying file
- // LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
- //[mpfi_eg
- #include <boost/multiprecision/mpfi.hpp>
- #include <boost/math/special_functions/gamma.hpp>
- #include <iostream>
- int main()
- {
- using namespace boost::multiprecision;
- // Operations at variable precision and no numeric_limits support:
- mpfi_float a = 2;
- mpfi_float::default_precision(1000);
- std::cout << mpfi_float::default_precision() << std::endl;
- std::cout << sqrt(a) << std::endl; // print root-2
- // Operations at fixed precision and full numeric_limits support:
- mpfi_float_100 b = 2;
- std::cout << std::numeric_limits<mpfi_float_100>::digits << std::endl;
- // We can use any C++ std lib function:
- std::cout << log(b) << std::endl; // print log(2)
- // Access the underlying data:
- mpfi_t r;
- mpfi_init(r);
- mpfi_set(r, b.backend().data());
- // Construct some explicit intervals and perform set operations:
- mpfi_float_50 i1(1, 2), i2(1.5, 2.5);
- std::cout << intersect(i1, i2) << std::endl;
- std::cout << hull(i1, i2) << std::endl;
- std::cout << overlap(i1, i2) << std::endl;
- std::cout << subset(i1, i2) << std::endl;
- mpfi_clear(r);
- return 0;
- }
- //]
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