#include <TTree.h>
#include <TFile.h>

class Newclassvar
{
public:
   Newclassvar(): var1(0),var2(0) {}

   int var1;
   int var2;
};

#ifdef __MAKECINT__
#pragma link C++ class Newclassvar+;
#endif

class tclassA {
public:
   tclassA() : sfile(0),fOutputTree(0),snewclassvar(0) {}
  virtual ~tclassA() {}

  TFile *sfile;
  TTree* fOutputTree;
  Newclassvar *snewclassvar;

  virtual void Initialize(void) {
    sfile = new TFile ("SFiles.root","RECREATE");
    
    fOutputTree = new TTree("userLoopTree","A simple summary tree");
    fOutputTree->SetDirectory(sfile);

    snewclassvar = new Newclassvar;

    fOutputTree->Branch("SBranch",&snewclassvar, 16000, 99);
    
  }

   bool operator () (int /* event */) {
    //do some stuff to get variables; for now I'll use dummies
    snewclassvar->var1 = 10.;
    snewclassvar->var2 = 11.;
    fOutputTree->Fill();
    return true; 
  }

  void Finalize() {    
    fOutputTree->Print();
    sfile->Write();
    sfile->Close();
  }

};

int working() {
  tclassA usercode;
  usercode.Initialize();
  usercode(0);
  usercode(0);
  usercode.Finalize();
  return 0;
}