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

void testclone(){
	TFile* file1 = TFile::Open("file1.root","RECREATE");
	TTree* tree1 = new TTree("tree1","tree1");
	std::vector<int> numbers;
	tree1->Branch("numbers","std::vector<int>",&numbers,32000,0);
	for(int i = 0; i < 10; ++i){
		numbers = {i,i+1,i+2};
		tree1->Fill();
	}
	tree1->Write();
	file1->Close();
	
	TFile* file_ref = TFile::Open("file1.root");
	TTree* tree_ref = (TTree*)file_ref->Get("tree1");
	auto n_ref = tree_ref->Draw("numbers","","goff");
	std::cout << n_ref << std::endl;
	tree_ref->SetMakeClass(1);

	TTree* tree2 = tree_ref->CloneTree(0);
	for(int i = 0; i < 10; ++i){
		tree_ref->GetEntry(i);
		tree2->Fill();
	}
	TFile* file2 = TFile::Open("file2.root","RECREATE");
	tree2->Write();
	file2->Close();
	file_ref->Close();
	
	TFile* file_test = TFile::Open("file2.root");
	TTree* tree_test = (TTree*)file_test->Get("tree1");
	auto n_test = tree_test->Draw("numbers","","goff");
	std::cout << n_test << std::endl;
}