text: #include <iostream>
  #include "json.hpp"
  
  using json = nlohmann::json;
  
  int main()
  {
      // create JSON values
      json object = {{"one", 1}, {"two", 2}};
      json null;
  
      // print values
      std::cout << object << '\n';
      std::cout << null << '\n';
  
      // add values:
      object.push_back({"three", 3});  // object is extended
      object += {"four", 4};           // object is extended
      null.push_back({"five", 5});     // null is converted to array
  
      // print values
      std::cout << object << '\n';
      std::cout << null << '\n';
  
      // would throw:
      //object.push_back({1, 2, 3});
  }
  