1 /////////////////////////////////////////////////////////////// 2 // Copyright 2013 John Maddock. Distributed under the Boost 3 // Software License, Version 1.0. (See accompanying file 4 // LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt 5 6 //[cpp_bin_float_eg 7 #include <boost/multiprecision/cpp_bin_float.hpp> 8 #include <boost/math/special_functions/gamma.hpp> 9 10 #include <iostream> 11 main()12int main() 13 { 14 using namespace boost::multiprecision; 15 16 // Operations at fixed precision and full numeric_limits support: 17 cpp_bin_float_100 b = 2; 18 std::cout << std::numeric_limits<cpp_bin_float_100>::digits << std::endl; 19 std::cout << std::numeric_limits<cpp_bin_float_100>::digits10 << std::endl; 20 21 // We can use any C++ std lib function, lets print all the digits as well: 22 std::cout << std::setprecision(std::numeric_limits<cpp_bin_float_100>::max_digits10) 23 << log(b) << std::endl; // print log(2) 24 25 // We can also use any function from Boost.Math: 26 std::cout << boost::math::tgamma(b) << std::endl; 27 // These even work when the argument is an expression template: 28 std::cout << boost::math::tgamma(b * b) << std::endl; 29 30 // And since we have an extended exponent range we can generate some really large 31 // numbers here (4.0238726007709377354370243e+2564): 32 std::cout << boost::math::tgamma(cpp_bin_float_100(1000)) << std::endl; 33 return 0; 34 } 35 36 //] 37