Mine
public text v1 · immutableInFile = new TFile(filename,"READ","",9);
tree = (TTree*) InFile->Get("tree");
Float * parameter = 0;
Int_t NEvents = tree->GetEntries();
//tree->Print();
tree->SetBranchAddress("branch name",¶meter);
for(i < NEvents)
{
tree->GetEntry(i);
cout << *parameter << endl;
}