Boost_float128.cpp

#include <boost/cstdfloat.hpp> // For float_64_t, float128_t. Must be first include!
#include <boost/math/special_functions/gamma.hpp>
#include <cmath>
#include <stdlib.h>
#include <cinttypes>
#include <iostream>

int main()
{


   boost::float128_t b = 2;
   //std::cout << std::numeric_limits<float128_t>::digits << std::endl;
   std::cout.precision(std::numeric_limits<boost::float128_t>::digits10);
   //std::cout << std::numeric_limits<float128_t>::digits10 << std::endl;
   std::cout.setf(std::ios_base::showpoint); // Include any trailing zeros.
   std::cout.precision(std::numeric_limits<boost::float128_t>::digits10);
   std::cout<< log(b) << std::endl; // Shows log(2) = 0.693147180559945309417232121458176575
   std::cout << boost::math::tgamma(b) << std::endl;
   //std::numeric_limits<float128_t>::max_digits10 = 36
   //boost::float128_t pi = 3.14159265358979323846264338327950288Q;
   constexpr boost::float128_t pi = 3.14159265358979323846264338327950288Q;
   std::cout << "pi = " << pi << std::endl; //pi = 3.14159265358979323846264338327950280

}