[ROOT] Different day, the same #$%^. (or working with ROOT Trees)

From: Anton Fokin (anton.fokin@smartquant.com)
Date: Sat May 12 2001 - 18:23:15 MEST 

Rene:

turning back to our TTree mistery issue.. I see that you have introduced
some changes: my program started to carsh in a few other places.

I am using ROOT bin of 25 April 2001 on win 98. Whatever #1 or #2 you
uncomment in the macro below, it kills the tree.

I am sorry if you have something new in CVS. I am using the latest bins
available on the ROOT site.

Sincerely,
Anton

www.smartquant.com

{
  gROOT->Reset();

  TFile *File = new TFile("c:\\root\\data\\test.root", "RECREATE");

  TTrade *Trade = new TTrade();

  TTree *Tree = new TTree("TradeTree", "");

  TradeTree     ->Branch("Trade", "TTrade", &Trade, 4*1024, 1);

  TradeTree     ->Write();

  for(Int_t i=0;i<100;i++) {
    Int_t N = TradeTree->GetEntries();
//
//  #1
//    for(Int_t l=0;l<N;l++)
//      TradeTree->GetEntry(l);

// #2
//    if (N) {
//      TradeTree->GetEntry(0);
//      TradeTree->GetEntry(N-1);
//    }

    Trade->Set(i,i,i,i);
    TradeTree->Fill();


  }

  Tree->AutoSave();

  delete Tree;
  delete File;
}

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