/* * A simple "Hello World" example that uses the POA */#include <fstream>#include "hello.h"using namespace std;/* * Hello World implementation inherits the POA skeleton class */class HelloWorld_impl : virtual public POA_HelloWorld{public:  void hello ();};voidHelloWorld_impl::hello (){  cout << "Hello World" << endl;}intmain (int argc, char *argv[]){  /*   * Initialize the ORB   */  CORBA::ORB_var orb = CORBA::ORB_init (argc, argv);  /*   * Obtain a reference to the RootPOA and its Manager   */  CORBA::Object_var poaobj = orb->resolve_initial_references ("RootPOA");  PortableServer::POA_var poa = PortableServer::POA::_narrow (poaobj);  PortableServer::POAManager_var mgr = poa->the_POAManager();  /*   * Create a Hello World object   */  HelloWorld_impl * hello = new HelloWorld_impl;  /*   * Activate the Servant   */  PortableServer::ObjectId_var oid = poa->activate_object (hello);  /*   * Write reference to file   */  ofstream of ("hello.ref");  CORBA::Object_var ref = poa->id_to_reference (oid.in());  CORBA::String_var str = orb->object_to_string (ref.in());  of << str.in() << endl;  of.close ();  /*   * Activate the POA and start serving requests   */  cout << "Running." << endl;  mgr->activate ();  orb->run();  /*   * Shutdown (never reached)   */  poa->destroy (TRUE, TRUE);  delete hello;  return 0;}