#define GENIAnalysis_cxx
#include "GENIAnalysis.h"
#include <TH2.h>
#include <TStyle.h>
#include <TCanvas.h>

void GENIAnalysis::Loop()
{
     std::vector<double> Energys;
//   In a ROOT session, you can do:
//      root> .L GENIAnalysis.C
//      root> GENIAnalysis t
//      root> t.GetEntry(12); // Fill t data members with entry number 12
//      root> t.Show();       // Show values of entry 12
//      root> t.Show(16);     // Read and show values of entry 16
//      root> t.Loop();       // Loop on all entries
//

//     This is the loop skeleton where:
//    jentry is the global entry number in the chain
//    ientry is the entry number in the current Tree
//  Note that the argument to GetEntry must be:
//    jentry for TChain::GetEntry
//    ientry for TTree::GetEntry and TBranch::GetEntry
//
//       To read only selected branches, Insert statements like:
// METHOD1:
//    fChain->SetBranchStatus("*",0);  // disable all branches
//    fChain->SetBranchStatus("branchname",1);  // activate branchname
// METHOD2: replace line
//    fChain->GetEntry(jentry);       //read all branches
//by  b_branchname->GetEntry(ientry); //read only this branch
   if (fChain == 0) return;

   Long64_t nentries = fChain->GetEntriesFast();

   Long64_t nbytes = 0, nb = 0;
   for (Long64_t jentry=0; jentry<nentries;jentry++) {
      Long64_t ientry = LoadTree(jentry);
      if (ientry < 0) break;
      nb = fChain->GetEntry(jentry);   nbytes += nb;
      // if (Cut(ientry) < 0) continue;
      
      std::cout<<"Event Number = "<<iev<<std::endl;
      
      //// Loop over the pdgs ////
      // Protons  2212 
      // Neutrons 2112        
      
	      for (Long64_t pdgindex=0; pdgindex<28;pdgindex++)
	      {
	      
		      if (pdgf[pdgindex] == 2212){
		      
		      	  std::cout<<"Energy= "<<Ef[pdgindex]<<std::endl;
		      	  
		      	  TH1D *h = new TH1D("Energy","Final Energy; Protons; Frequency", 50, 0, 2);
		      	  h->Draw();
		      }      
	    
	     }
     }
}