void treemanu2(){


TFile *f=new TFile ("Dstar0CPK_ccbar-Run4-29.root");
TTree *ntp999 = (TTree*)f->Get("ntp999");
Double_t m_mes;
TBranch *bm_mes=ntp999->GetBranch("m_mes");
bm_mes->SetAddress(&m_mes);
//bm_mes->Print();

 TH1F *hmes   = new TH1F("hmes","Mes",100,-5.273,5.283);

   Int_t nentries = (Int_t)ntp999->GetEntries();
   for (Int_t i=0;i<nentries;i++) {
     cout << "i=" << i << endl;
     bm_mes->GetEntry(i);
     //  bm_mes->Print();
      cout <<"mes=" <<m_mes << endl;
      hmes->Fill(m_mes);
   }
}