#include <vector>
#include <string>
#include <iostream>

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

int main(int argc, char **argv)
{
    // This is needed to create dictionary entries for ROOT classes
    TApplication* app = new TApplication("app", &argc, argv);

    TFile* file = new TFile("161992.root");
    TTree* tree = (TTree*) file->Get("HWWTree_quadlep");
    Long64_t nEntries = tree->GetEntries();

    std::vector<Float_t>* m_jet_E = NULL;
    TBranch* b_m_jet_E = NULL; 
    tree->SetBranchAddress("m_jet_E", &m_jet_E, &b_m_jet_E);

    for(Long64_t entry = 0; entry < nEntries; entry++)
    {
        //tree->GetEntry(entry); // Do not use this
        Long64_t tentry = tree->LoadTree(entry);
        b_m_jet_E->GetEntry(entry);
        std::cout << m_jet_E->size() << std::endl;
    }

    return 0;
}