Simple example of parsing and consuming JSON array with boost::property_tree

boost_property_tree_json_array.cpp

#ifdef _MSC_VER
#include <boost/config/compiler/visualc.hpp>
#endif
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
#include <boost/foreach.hpp>
#include <cassert>
#include <exception>
#include <iostream>
#include <sstream>
#include <string>

int main()
{
    try
    {
        std::stringstream ss;
        ss << "{ \"root\": { \"values\": [1, 2, 3, 4, 5 ] } }";

        boost::property_tree::ptree pt;
        boost::property_tree::read_json(ss, pt);

        BOOST_FOREACH(boost::property_tree::ptree::value_type &v, pt.get_child("root.values"))
        {
            assert(v.first.empty()); // array elements have no names
            std::cout << v.second.data() << std::endl;
        }
        return EXIT_SUCCESS;
    }
    catch (std::exception const& e)
    {
        std::cerr << e.what() << std::endl;
    }
    return EXIT_FAILURE;
}

Hi there,
I am searching 1.instrument_name, 2.bids, 3.asks from json below:

{"jsonrpc":"2.0","method":"subscription","params":{"channel":"book.BTC-PERPETUAL.raw","data":{"type":"change","timestamp":1635513739435,"prev_change_id":6807100702,"instrument_name":"BTC-PERPETUAL","change_id":6807100703,"bids":[["new",60772.0,50.0]],"asks":[]}}}

have there any iteration for these three fields?
like I am still confusing because I use your example code.

Thanks in advance.