#include <iomanip>

int TTree_simple_read () 
{
  Int_t det;
  Float_t energy , time;

  TFile f ("simple.root");
  TTree *t = (TTree*) f.Get ("tree");
  t->SetBranchAddress ("Det" , &det   );
  t->SetBranchAddress ("En"  , &energy);
  t->SetBranchAddress ("Time", &time  );

  for (int i=0; i<t->GetEntries(); i++) {
    t->GetEntry (i);
    cout << setw( 5) << det 
         << setw(12) << time 
         << setw(12) << energy << endl;
  }
  return 0;
}