#include "TFile.h"
#include "TTree.h"

#include <iostream>

void problem(void) {
  TFile *file = TFile::Open("/publicfs/dyb/data/userdata/chloh/Project/Production/RadioActivity/AmC/Output/run000.rec.root", "read");
  if (!file) {
    std::cout << "Error: file not found." << std::endl;
    return;
  }
  
  TTree *tree;
  file->GetObject("Event/CalibReadout/CalibReadoutHeader", tree);
  if (!tree) {
    std::cout << "Error: tree not found." << std::endl;
    delete file;
    return;
  }
  tree->SetMakeClass(1);
  tree->SetBranchStatus("*", 0);
  tree->Print();
  
  UInt_t triggerTimeSec=1; 
  tree->SetBranchStatus("triggerTimeSec", 1);
  tree->SetBranchAddress("triggerTimeSec", &triggerTimeSec);
  
  Long64_t nentries=tree->GetEntries();
  for(Long64_t jentry = 0; jentry < nentries; jentry++) {
    tree->GetEntry(jentry);
    std::cout << "triggerTimeSec = " << triggerTimeSec << std::endl;
  }
  
  tree->ResetBranchAddresses(); // "detach" from local variables
}