TheProjectsGuy

// Header file for ROS
#include "ros/ros.h"
// Header file for messages
#include "std_msgs/Float64.h"

int main(int argc, char **argv)
{
    // Initialize the node, name it NumberPublisher
    ros::init(argc, argv, "NumberPublisher");
    // Create a node handler

jdumont0201

#include <ros/ros.h>
#include <std_msgs/Int32>

void counterCallback(const std_msgs::Int32::ConstPtr& msg)
{
  ROS_INFO("%d", msg->data);
}

int main(int argc, char** argv) {

jdumont0201

#include <ros/ros.h>
#include <std_msgs/Int32.h>

int main(int argc, char** argv) {

    ros::init(argc, argv, "topic_publisher");
    ros::NodeHandle nh;
    
    ros::Publisher pub = nh.advertise&lt;std_msgs::Int32&gt;("counter", 1000);
    ros::Rate loop_rate(2);