// ROOT macro

void readFakeTree() {
	TFile* tf = new TFile("fakeTree.root", "READ");
	TTree* tt = static_cast<TTree*>(tf->Get("tt"));
	
	TBranch* blen = tt->GetBranch("len");
	TBranch* bx = tt->GetBranch("x");
	
	int len;
	float x[12];
	blen->SetAddress(&len);
	blen->SetAddress(x);

	int nEntries = tt->GetEntries();

	for (int i=0; i < nEntries; i++) {
		tt->GetEntry(i);
		for (int j=0; j < len; j++) 
			cout << x[j] << " ";
		cout << endl;
	}
}