rapidjosn 使用

    std::string output;
    readFileContent("dotline.coh", output);
    printf("%d\n", output.size());
    
    Document doc;
    doc.Parse(output.c_str());
    bool IsObject=doc.IsObject();
    auto obj = doc.GetObject();    
    
    Document doc1(rapidjson::Type::kObjectType);
    doc1.AddMember("my_test", obj, doc1.GetAllocator());
    StringBuffer buffer;      // in rapidjson/stringbuffer.h
    PrettyWriter<StringBuffer> writer(buffer); // in rapidjson/writer.h
    doc1.Accept(writer);     

    writeFileContent("test.json", buffer.GetString());