My C++ program below is supposed to read a json file called english.json and display the “title” information.
#include <iostream>
#include <fstream>
#include <json/value.h>
#include <json/reader.h>
using namespace std;
int main()
{
Json::Value language;
ifstream language_file("english.json", std::ifstream::binary);
language_file >> language;
cout << language["title"] << endl;
return 0;
}
But when I run the program, I get this error:
E0349 No operator “<<” matches these operands
The program cannot display the information.
I looked at the documentation, but it wasn’t very clear, so I couldn’t find the source of the problem.
I’ve also try to include the json.h file, but it causes other errors related to “unresolved external symbols”.
Anorak The Omniscient is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
26
The operator<< overload you are trying to use is declared in json/writer.h so you need include that too, or replace all your json/* includes with #include <json/json.h>, which will include all the rest of the jsoncpp header files.
Another option is to call the correct as* member function to get the actual value from the Json::Value, eg:
std::cout << language["title"].asString() << 'n';
// ^^^^^^^^^^
You also need to link with the jsoncpp library to not get “unresolved external symbols”.
2
Try this :
cout << language["title"].asString() << endl;
Wanna join the council is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
1