Code_Q2_Client_11Oct20

#include "ros/ros.h"
#include "geometry_msgs/Point.h"
#include "server_msgs/Swarm.h"

using namespace std;

void chatterCallback(const server_msgs::Swarm::ConstPtr& msg) {
  //	ROS_INFO("I heard: [%s]", msg->crowds.size());
	cout << "Size of crowd: " << msg->crowds.size() << endl;
}

int main(int argc, char **argv) {
	ros::init(argc, argv, "clientNode");
	ros::NodeHandle n;
	std::string topicName = "server_msgs/Swarm";
	ros::Subscriber sub = n.subscribe(topicName, 1000, chatterCallback);
	ros::spin();
	return 0;
}