#include <TROOT.h>
#include <TFile.h>
#include <TH2D.h>
#include <TH1F.h>
#include <TH1.h>
#include <TProfile2D.h>
#include <TStyle.h>
#include <TCanvas.h>
#include <TNtuple.h>
#include <TString.h>
#include <iostream>
#include <cstring>
#include <string>
using namespace std;

void overlap2()
{
  gROOT->SetStyle("Plain");
  gStyle->SetTitle(0);

  char buf[256];
 
  TFile* f1 =     new TFile("tau3_40.root");
  TFile* f2 =     new TFile("el3_40.root");
  TFile* f3 =     new TFile("J_1_40.root");
  TFile* output = new TFile("test.root", "RECREATE");                
     
 const int nvar =12;
 const char*    chvar[nvar]={"tau_seedCalo_EMRadius" ,"tau_seedCalo_centFrac","tau_seedCalo_isolFrac","tau_seedCalo_trkAvgDist","tau_etOverPtLeadTrk","tau_massTrkSys","tau_jet_emfrac","tau_calcVars_topoInvMass","tau_TRThitsRatio","tau_trFlightPathSig","tau_ipZ0SinThetaSigLeadTrk","tau_seedCalo_nIsolLooseTrk"};
 

  

  


  for (int ivar = 0; ivar<nvar; ++ivar) {

    strcpy(buf,chvar[ivar]);
    strcat(buf,"_teste5");
    TH1F* h1 = (TH1F*)f1->Get(chvar[ivar])->Clone(buf);
    
    strcpy(buf,chvar[ivar]);
    strcat(buf,"_teste4");
    TH1F* h2 = (TH1F*)f2->Get(chvar[ivar])->Clone(buf);
 


    strcpy(buf,chvar[ivar]);
    strcat(buf,"_teste6");
    TH1F* h3 = (TH1F*)f3->Get(chvar[ivar])->Clone(buf);



      double scalefactorT = 1/(h1->GetBinContent(h1->GetMaximumBin()));
        h1->Scale(scalefactorT);

     double scalefactorE = 1/(h2->GetBinContent(h2->GetMaximumBin()));
	h2->Scale(scalefactorE);

     double scalefactorJ = 1/(h3->GetBinContent(h3->GetMaximumBin()));
	h3->Scale(scalefactorJ);



    h1->SetLineWidth(2);
    h1->SetLineColor(kRed);
    //h1->SetFillColor(4);
  

    h2->SetLineWidth(2);
    h2->SetLineColor(kBlue);
    //   h2->SetFillColor(kYellow);
  
    h3->SetLineWidth(2);
    h3->SetLineColor(kYellow);
    //h3->SetFillColor(kGreen);

 

    //TLegend*leg =new TLegend(0.7, 0.9, 0.93, 0.75);
    //  leg->SetHeader("Z -> #tau #tau");
    //    leg->AddEntry(h1, "Ztautau", "l");
    //leg->AddEntry(h2, "Zee", "l");
    //leg->AddEntry(h3,"QCD dijets","l");
    // leg->SetFillColor(0);
    //leg->Draw();


    
    sprintf(buf,"test%d",ivar+1);
    TCanvas* c1 = new TCanvas(buf,buf);
   
        
 

    h1->Draw();
    h2->Draw("same");
    h3->Draw("same");

    //TLegend*leg =new TLegend(0.75, 0.9, 0.93, 0.75);
    //  leg->SetHeader("Z -> #tau #tau");                                                                                                                    
    //leg->AddEntry(h1, "Ztautau", "l");
    //leg->AddEntry(h2, "Zee", "l");
    //    leg->AddEntry(h3,"QCD dijets","l");
    //leg->SetFillColor(0);
    //leg->Draw();


    c1->Modified();
    strcat(buf,".pdf");
    c1->SaveAs(buf);
    c1->Write();
    //    c1->Update();    
//     output->close();
 }
}