c++ - boost property tree cannot read multiple json data in one file -

i need decide problem. using boost property tree parse twitter messages stored in json file. messages saved in 1 json file , need parse 1 one.

here twitter json data saved in file. has 3 different messages. (below deducted message test)

{"id":593393012970926082,"in_reply_to_status_id":1,"user":{"id":2292380240,"followers_count":2},"retweet_count":0} {"id":654878454684687878,"in_reply_to_status_id":7,"user":{"id":2292380241,"followers_count":4},"retweet_count":5} {"id":123487894154878414,"in_reply_to_status_id":343,"user":{"id":2292380242,"followers_count":773},"retweet_count":654} 

and here c++ code parsing message, using property tree.

#include <boost/property_tree/json_parser.hpp>  using namespace std; using namespace boost::property_tree; string jsonfile = "./twitter.json";   int main() {       ptree pt;     read_json( jsonfile, pt );     cout<<"in_reply_to_status_id: "<<pt.get("in_reply_to_status_id",0)<<"\n"; } 

i want in_reply_to_status_id values file. printing first line value. result printing follow.

in_reply_to_status_id: 1

i values below.

in_reply_to_status_id: 1

in_reply_to_status_id: 7

in_reply_to_status_id: 343

how can values file. please me. thank much.

you should have right json file, example this

[    {"id":593393012970926082,"in_reply_to_status_id":1,"user":{"id":2292380240,"followers_count":2},"retweet_count":0},    {"id":654878454684687878,"in_reply_to_status_id":7,"user":{"id":2292380241,"followers_count":4},"retweet_count":5},    {"id":123487894154878414,"in_reply_to_status_id":343,"user":{"id":2292380242,"followers_count":773},"retweet_count":654} ] 

and code should this

for (const auto& p : pt) {    cout << p.second.get("in_reply_to_status_id",0) << endl; } 

instead of range-based for, can use boost_foreach example.

boost_foreach(const ptree::value_type& p, pt)