C++ (Cpp) Singleton::doSomething примеры использования

Пример #1

/*
  main..
//*/
int main()
{
  using namespace std;

  Singleton* ptr = NULL;

  do{
    cout << "create Singleton:\n";
    if(NULL == (ptr = Singleton::getInstance())){
      cout << "Singleton allocation failed!\n";
      break;
    }
    cout << endl;
  
    cout << "use the Singleton\n";
    ptr->doSomething();
    cout << endl;
  
    cout << "destroy Singleton.. - is not permitted!\n";
  }while(false);

  cout << "READY.\n";
  return 0;
}