const std::string rawJson = R"({"Age": 20, "Name": "colin"})";

const auto rawJsonLength = static_cast<int>(rawJson.length());

constexpr bool shouldUseOldWay = false;

JSONCPP_STRING err;

Json::Value root;

if (shouldUseOldWay) {

Json::Reader reader;

reader.parse(rawJson, root);

} else {

Json::CharReaderBuilder builder;

const std::unique_ptr<Json::CharReader> reader(builder.newCharReader());

if (!reader->parse(rawJson.c_str(), rawJson.c_str() + rawJsonLength, &root,

&err)) {

std::cout << "error: " << err << std::endl;

return EXIT_FAILURE;

}

}

const std::string name = root["Name"].asString();

const int age = root["Age"].asInt();

std::cout << name << std::endl;

std::cout << age << std::endl;

return EXIT_SUCCESS;