text: #include <iostream>
  #include <pcl/io/pcd_io.h>
  #include <pcl/point_types.h>
  
  int
    main (int argc, char** argv)
  {
    pcl::PointCloud<pcl::PointXYZ> cloud_a, cloud_b, cloud_c;
  
    // Fill in the cloud data
    cloud_a.width  = 5;
    cloud_b.width  = 3;
    cloud_a.height = cloud_b.height = 1;
    cloud_a.points.resize (cloud_a.width * cloud_a.height);
    cloud_b.points.resize (cloud_b.width * cloud_b.height);
  
    for (size_t i = 0; i < cloud_a.points.size (); ++i)
    {
      cloud_a.points[i].x = 1024 * rand () / (RAND_MAX + 1.0f);
      cloud_a.points[i].y = 1024 * rand () / (RAND_MAX + 1.0f);
      cloud_a.points[i].z = 1024 * rand () / (RAND_MAX + 1.0f);
    }
  
    for (size_t i = 0; i < cloud_b.points.size (); ++i)
    {
      cloud_b.points[i].x = 1024 * rand () / (RAND_MAX + 1.0f);
      cloud_b.points[i].y = 1024 * rand () / (RAND_MAX + 1.0f);
      cloud_b.points[i].z = 1024 * rand () / (RAND_MAX + 1.0f);
    }
  
    std::cerr << "Cloud A: " << std::endl;
    for (size_t i = 0; i < cloud_a.points.size (); ++i)
      std::cerr << "    " << cloud_a.points[i].x << " " << cloud_a.points[i].y << " " << cloud_a.points[i].z << std::endl;
  
    std::cerr << "Cloud B: " << std::endl;
    for (size_t i = 0; i < cloud_b.points.size (); ++i)
      std::cerr << "    " << cloud_b.points[i].x << " " << cloud_b.points[i].y << " " << cloud_b.points[i].z << std::endl;
  
    // Copy the point cloud data
    cloud_c  = cloud_a;
    cloud_c += cloud_b;
  
    std::cerr << "Cloud C: " << std::endl;
    for (size_t i = 0; i < cloud_c.points.size (); ++i)
      std::cerr << "    " << cloud_c.points[i].x << " " << cloud_c.points[i].y << " " << cloud_c.points[i].z << " " << std::endl;
  
    return (0);
  }