void rohit()
{

	TCanvas *c1 = new TCanvas("c1","Normal Canvas");
	
	

	TFile *f = new TFile("tutorial4.root","READ");


	TH1F *h1 = new TH1F("Histogram","Histogram",100,0,1000 );

	TTree *t = (TTree*)f->Get("tree");

	//  Total Paticles 
	Int_t ro = 0;
	
	//Index Variable 
	Int_t i,j,k;			
	Int_t m;
	Int_t l;
	
	// Kinematic Variable
	Float_t Px,Py,Pz,pt,eta;
	Int_t id,mult;
	Float_t  phi,y;
	
	Int_t  entry = t->GetEntries();
	
	cout<<"Total Entries are : "<<entry<<endl;
	
	t->SetBranchAddress("size",&mult);

 	for(i=1;i<=entry;i++)
 	{
 	t->GetEntry(i);
 	cout<<"Total Multiplicity is : "<<mult<<endl;
 
 	
 	
 	for(j=1;j<=mult;j++)
 	{
 	pt = t->GetLeaf("pt")->GetValue(j);
 	eta = t->GetLeaf("eta")->GetValue(j);
 	y = t->GetLeaf("y")->GetValue(j);
 	id = t->GetLeaf("id")->GetValue(j);
 	
 	
 	cout<<pt<<endl;
 	
 	h1->Fill(pt);
 	
 	}
 	}
 	h1->Draw();
 
	

	






}