#include <iostream>
#include <fstream>
#include <string>
#include <locale>
#include <sstream>
#include <stdio.h>
//#include <stlib.h>
#include <math.h>
#include <cmath>
#include <TROOT.h>

#define PI 3.14159265

#include "TPad.h"
#include "TFile.h"
#include "TTree.h"
#include "TChain.h"
#include "TVirtualPad.h"
#include "TProfile.h"
#include "TH1.h"
#include "TH2.h"
#include "TF1.h"
#include "TCanvas.h"
#include "TRandom.h"
#include "TStyle.h"
#include "TMath.h"
#include "TLatex.h"
#include <time.h>
#include <TDatime.h>
#include <TRandom3.h>

using namespace std;


void test(){

	char* position = new char[100];
	double nth_v0;

	TFile *file_test = new TFile("test_file.root", "RECREATE");
	TTree *tree_test = new TTree("tree_test", "tree_test");

	tree_test->Branch("position", position, "position/C");
	tree_test->Branch("nth_v0", &nth_v0, "nth_v0/D");

	ifstream fin_test("test.txt", ios::in);

	while (fin_test.good()){

		fin_test >> position >> nth_v0;

		cout << "position = " << position << "\t nth_v0 = " << nth_v0 << endl;

		tree_test->Fill();
	}



	TCanvas *can_nv = new TCanvas("can_nv", "nv Calculation", 0, 0, 850, 650);
	can_nv->Divide(1, 1);
	can_nv->ToggleEditor();
	can_nv->ToggleEventStatus();
	can_nv->ToggleToolBar();
	gStyle->SetOptStat(0);
	gStyle->SetPalette(1);
	gPad->SetFillColor(10);

	TH2F *pos_nthv0 = new TH2F("pos_nthv0", "nthv0 vs position", 4, 0, 4, 40, 710000, 950000);
	can_nv->cd(1);
	pos_nthv0->SetMarkerStyle(26);
	tree_test->Draw("nth_v0 : position >> pos_nthv0","","");
	//tree_test->Draw("col");



}