ROS Laser sensor subscriber

laser_sensor_subscriber.cpp

#include <ros/ros.h> 
#include <sensor_msgs/LaserScan.h>

void counterCallback(const sensor_msgs::LaserScan::ConstPtr& msg){
    ROS_INFO("LaserScan (val,angle)=(%f,%f", msg->range_min,msg->angle_min);
}
int main(int argc, char** argv) {
    ros::init(argc, argv, "topic_subscriber");
    ros::NodeHandle nh;
    ros::Subscriber sub = nh.subscribe("/kobuki/laser/scan", 1000, counterCallback);
    ros::spin();
    return 0;
}