Int_t testmain() {
  string filename= "126937.root"; //File of the n-tuple
  TFile* input= new TFile(filename.c_str(),"READ");
  TTree* tree;
  input->GetObject("HWWTree_quadlep",tree);
  Long_t nEvent = tree-> GetEntries();
  cout<<"The number of unnormalized events is "<< nEvent<<endl;
 
//  Looping through events  
Int_t a=2;
Int_t b=3;
Int_t c;

    for (Long_t iEvent = 0; iEvent< nEvent; iEvent++) {
	c=a+b; 
     tree->GetEntry(iEvent);
	cout<<c<<endl;
}	
    for (Long_t i = 0; i< nEvent; i++) {
	c=a+b;
	cout<<c<<endl;	
}

return 0;}