#include <rapidjson/writer.h>
#include <fstream>
int main()
{
rapidjson::StringBuffer sb;
rapidjson::Writer<rapidjson::StringBuffer> writer(sb);
writer.StartObject();
writer.Key("myKey");
writer.Uint(123);
writer.EndObject();
std::ofstream ofs("output.json");
ofs << sb.GetString();
ofs.close();
return 0;
}