#include <TTree.h>
#include <TFile.h>
#include <iostream>

int main() {
    TFile f("hsimple.root");
//    TFile f("ntup.root");
    TTree * tree = (TTree*) f.Get("ntuple");
    tree->SetBranchStatus("*", 0);
    int entries = tree->GetEntries();
	 std::cout << "entries " << entries << std::endl;
    for (int i = 0; i < entries; i++) {
        tree->GetEntry(i);
    }
    return 0;
}