Here is a C++ program that can be used as the client of this Three Tier System:

0814: #include <iostream.h>
0815: #include <stdlib.h>
0816: #include <OB/CORBA.h>
0817: #include <OB/CosNaming.h>
0818: #include <AgesDB.h>
0819: int main(int argc, char* argv[], char*[]) {
0820:    try {
0821:       CORBA_ORB_var orb = CORBA_ORB_init(argc, argv);
0822:       CORBA_BOA_var boa = orb -> BOA_init(argc, argv);
0823:       CORBA_Object_var objRef = orb -> string_to_object(argv[1]);
0824:       CosNaming_NamingContext_var ncRef = 
0825:             CosNaming_NamingContext::_narrow(objRef);
0826:       CosNaming_Name path;
0827:       path.length(1);
0828:       path[0].id = CORBA_string_dup("AgesDB");
0829:       path[0].kind = CORBA_string_dup("");
0830:       AgesDBApp_AgesDB_var stubAgesDB = 
0831:             AgesDBApp_AgesDB::_narrow(ncRef -> resolve(path));
0832:       char stdinLine[100];
0833:       char in_last[10];
0834:       char in_first[10];
0835:       char in_age[10];
0836:       char *out_firstptr = 0;
0837:       char *out_ageptr = 0;
0838:       bool stillMoreRequests = true;
0839:       while ( stillMoreRequests ) {
0840:          cout << "agqr: ";  cin >> stdinLine;
0841:          switch ( stdinLine[0] ) {
0842:             case 'a':
0843:                cout << "last: ";  cin >> in_last;
0844:                cout << "first: "; cin >> in_first;
0845:                cout << "age: ";   cin >> in_age;
0846:                stubAgesDB -> addPerson(in_last, in_first, in_age);
0847:                break;
0848:             case 'g':
0849:                cout << "last: ";  cin >> in_last;
0850:                stubAgesDB -> getPerson(in_last, out_firstptr, out_ageptr);
0851:                cout << out_firstptr << " " << out_ageptr << endl;
0852:                break;
0853:             case 'q':
0854:                stillMoreRequests = false;
0855:                break;
0856:             case 'r':
0857:                cout << "last: ";  cin >> in_last;
0858:                stubAgesDB -> removePerson(in_last);
0859:                break;
0860:             default:
0861:                break;
0862:          }
0863:       }
0864:    } 
0865:    catch ( ... ) {
0866:       cout << "whoops" << endl;
0867:    }
0868: }

With the help of OmniBroker, this C++ program can be compiled and executed in a similar way to the C++ program given earlier.