#include <iostream>
#include <bsoncxx/json.hpp>
 #include <bsoncxx/builder/basic/array.hpp>
 #include <bsoncxx/builder/stream/document.hpp>
 #include <bsoncxx/builder/basic/document.hpp>
using namespace bsoncxx;
using namespace std;
using bsoncxx::builder::basic::kvp;
using bsoncxx::builder::basic::document;
int main(void) {
  bsoncxx::builder::stream::document d1;
  bsoncxx::builder::basic::document d2;
  cout.precision(17);
  double v1=1.0123456789;
  double v2=9.8765432111;
  d1<<"T1"<<v1;
  cout<<bsoncxx::to_json(d1.view())<<endl;
 d2.append(kvp("T2", types::b_double{v2}));
 cout<<bsoncxx::to_json(d2.view())<<endl;
  cout<<"V1: "<<v1<<endl;
  cout<<"V2: "<<v2<<endl;
  cout<<"T1: "<<d1.view()["T1"].get_double()<<endl;
  cout<<"T2: "<<d2.view()["T2"].get_double()<<endl;
}

{
 "T1" : 1.01235
 }
 {
 "T2" : 9.87654
 }
V1: 1.0123456789
 V2: 9.8765432110999996
 T1: 1.0123456789
 T2: 9.8765432110999996

{
 "T1" : 1.0123456789
 }
{
 "T2" : 9.8765432110999996
 }