simple pointcloud subscriber

edit

I'm new to ROS and I stuck in a beginner problem. I already did the ROS Tutorials where I wrote a subscriber but it doesn't explain my problem. I wanna write a simple subscriber in C++ for the kinect (topic => /camera/depth_registered/points). My code looks like the following:

void pcdCallback(const sensor_msgs::PointCloud2ConstPtr& msg) {

ROS_INFO("pointcloud recieved");

}

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

ros::init(argc, argv, "pcdlistener");

ros::NodeHandle n;

ros::Subscriber sub = n.subscribe("/camera/depth_registered/points", 1000, pcdCallback);

ros::spin();

return 0;

}

My Problem is now that the compiling produces the following failure:

/home/ronny/ros/pkgs/subscriber_pcd/src/pcdsubscriber.cpp:7: error: ISO C++ forbids declaration of ‘sensor_msgs’ with no type

would be great to get a hint or solution.

regards