ceph/src/boost/libs/multiprecision/example/debug_adaptor_snips.cpp

   1 ///////////////////////////////////////////////////////////////
   2 //  Copyright 2011 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 #include <boost/multiprecision/cpp_dec_float.hpp>
   7 #include <boost/multiprecision/debug_adaptor.hpp>
   8 #include <iostream>
   9
  10 void t1()
  11 {
  12    //[debug_adaptor_eg
  13    //=#include <boost/multiprecision/debug_adaptor.hpp>
  14    //=#include <boost/multiprecision/cpp_dec_float.hpp>
  15
  16    using namespace boost::multiprecision;
  17
  18    typedef number<debug_adaptor<cpp_dec_float<50> > > fp_type;
  19
  20    fp_type denom = 1;
  21    fp_type sum = 1;
  22
  23    for(unsigned i = 2; i < 50; ++i)
  24    {
  25       denom *= i;
  26       sum += 1 / denom;
  27    }
  28
  29    std::cout << std::setprecision(std::numeric_limits<fp_type>::digits) << sum << std::endl;
  30    //]
  31 }
  32
  33 int main()
  34 {
  35    t1();
  36    return 0;
  37 }
  38
  39
  40