Reading Ttree from ROOT file

Newbie
1

I want to read i_th and j_th entry from a Ttree using a for loop, for example:

for (Long64_t entryi = 0; entryi < tree_sig->GetEntries(); ++entryi) {
        tree_sig->GetEntry(entryi);
        entryj=4;
        tree_sig->GetEntry(entryj);
}

But this give me break segmentation error. Could you please help me.

2

First check: are you sure the tree has enough entries for the index you set by hand? (in this case, 5 entries, so that there is an entry number 4)