| // (C) Copyright John Maddock 2007. |
| // Use, modification and distribution are subject to the |
| // Boost Software License, Version 1.0. (See accompanying file |
| // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| |
| #include <boost/math/bindings/rr.hpp> |
| #include <boost/limits.hpp> |
| #include <vector> |
| |
| void write_table(unsigned max_exponent) |
| { |
| boost::math::ntl::RR max = ldexp(boost::math::ntl::RR(1), max_exponent); |
| |
| std::vector<boost::math::ntl::RR> factorials; |
| factorials.push_back(1); |
| |
| boost::math::ntl::RR f(1); |
| unsigned i = 1; |
| |
| while(f < max) |
| { |
| factorials.push_back(f); |
| ++i; |
| f *= i; |
| } |
| |
| // |
| // now write out the results to cout: |
| // |
| std::cout << std::scientific; |
| std::cout << " static const boost::array<T, " << factorials.size() << "> factorials = {\n"; |
| for(unsigned j = 0; j < factorials.size(); ++j) |
| std::cout << " " << factorials[j] << "L,\n"; |
| std::cout << " };\n\n"; |
| } |
| |
| |
| int main() |
| { |
| boost::math::ntl::RR::SetPrecision(300); |
| boost::math::ntl::RR::SetOutputPrecision(40); |
| write_table(16384/*std::numeric_limits<float>::max_exponent*/); |
| } |