Ticket #270: counter.C

void counter(const char *inputFile)
{
  gSystem->Load("libDelphes");

  TChain chain("Delphes");
  chain.Add(inputFile);

  ExRootTreeReader *treeReader = new ExRootTreeReader(&chain);
  Long64_t numberOfEntries = treeReader->GetEntries();

  TClonesArray *branchElectron = treeReader->UseBranch("Electron");
  TClonesArray *branchMuon = treeReader->UseBranch("Muon");
 
  Int_t entry;
  Int_t counter[2] = {0, 0};
 
  for(entry = 0; entry < numberOfEntries; ++entry)
  {
    treeReader->ReadEntry(entry);
    counter[0] += branchElectron->GetEntriesFast();
    counter[1] += branchMuon->GetEntriesFast();
  }

  cout << counter[0] << "\t" << counter[1] << endl;
}