5007.jsoncpp库编程

jsoncpp 库的使用.

 //2.测试一下jsoncpp库是否好使.
            Json::Value root;
            Json::Value data;
            root["action"] = "run";
            data["number"] = 1;
            root["data"] = data;
            Json::FastWriter writer;
            std::string json_str = writer.write(root);
            RCLCPP_INFO(this->get_logger(), "json:'%s' --> test ", json_str.c_str());

            //3.解析json数据
            Json::Value root1;
            Json::Reader reader;
            reader.parse(json_str, root1);

            string action_ = root1["action"].asString();
            Json::Value  data1 = root1["data"];
            string number_ = data1["number"].asString();
            RCLCPP_INFO(this->get_logger(), "json_parse:'%s', '%s' --> test ", action_.c_str(), number_.c_str());

ros2 工程配置