talker.cpp

#include "ros/ros.h"
#include "std_msgs/String.h"
#include <sstream>
int main(int argc, char **argv){
ros::init(argc, argv, “talker”);
ros::NodeHandle n;
ros::Publisher chatter_pub = n.advertise<std_msgs::String>(“chatter”, 1000);
ros::Rate loop_rate(10);
int count = 0;
while (ros::ok()){
  std_msgs::String msg;
  std::stringstream ss;
  ss << “hello world “ << count;
  msg.data = ss.str();
  ROS_INFO(“%s”, msg.data.c_str());
  chatter_pub.publish(msg);
  ros::spinOnce();
  loop_rate.sleep();
  ++count;
  }
 return 0;
}