// eg2_clt.cc - This is the source code of example 2 used in Chapter 2//              "The Basics" of the omniORB user guide.////              This is the client. The object reference is given as a//              stringified IOR on the command line.//// Usage: eg2_clt <object reference>//#include <echo.hh>#ifdef HAVE_STD#  include <iostream>#  include <fstream>   using namespace std;#else#  include <iostream.h>#endifstatic void hello(Echo_ptr e){  CORBA::String_var src = (const char*) "Hello!";  CORBA::String_var dest = e->echoString(src);  cerr << "I said, \"" << (char*)src << "\"." << endl       << "The Echo object replied, \"" << (char*)dest <<"\"." << endl;}//////////////////////////////////////////////////////////////////////int main(int argc, char** argv){  try {    CORBA::ORB_var orb = CORBA::ORB_init(argc, argv);    if( argc != 2 ) {      cerr << "usage:  eg2_clt <object reference>" << endl;      return 1;    }    CORBA::Object_var obj = orb->string_to_object(argv[1]);    Echo_var echoref = Echo::_narrow(obj);    if( CORBA::is_nil(echoref) ) {      cerr << "Can't narrow reference to type Echo (or it was nil)." << endl;      return 1;    }    for (CORBA::ULong count=0; count<10; count++)       hello(echoref);    orb->destroy();  }  catch(CORBA::COMM_FAILURE& ex) {    cerr << "Caught system exception COMM_FAILURE -- unable to contact the "         << "object." << endl;  }  catch(CORBA::SystemException&) {    cerr << "Caught a CORBA::SystemException." << endl;  }  catch(CORBA::Exception&) {    cerr << "Caught CORBA::Exception." << endl;  }  catch(omniORB::fatalException& fe) {    cerr << "Caught omniORB::fatalException:" << endl;    cerr << "  file: " << fe.file() << endl;    cerr << "  line: " << fe.line() << endl;    cerr << "  mesg: " << fe.errmsg() << endl;  }  catch(...) {    cerr << "Caught unknown exception." << endl;  }  return 0;}