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#include "ros/ros.h"#include "std_msgs/String.h"#include 
   
    #include 
    
     #include 
     
      void chatterCallback(const geometry_msgs::PoseWithCovarianceStamped::ConstPtr& msg){  double x=msg->pose.pose.position.y;  double y=msg->pose.pose.position.x;  //double theta=msg->pose.pose.orientation;  std::cout<
      
       <
       
        <
        
         point.x; double y=msg->point.y; //double theta=msg->pose.pose.orientation; std::cout<
         
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           <