#include <iostream>

#include "TFile.h"
#include "TH1F.h"

using namespace std;

void test()
{
/*
    {
        TFile f("test.root", "RECREATE");

        TH1F h("h","",10,0,10);
        h.Fill(2);
        h.Draw();

        cout << "File and histogram saved" << endl;
        h.Write();
        f.ls();

        cout << "Histogram deleted from TFile, not from memory" << endl;
        f.Delete("h;1");
        f.ls();
        cout << h.GetMean() << endl;

        cout << "File closed ==> histogram is deleted from canvas AND memory!!!" << endl;
        f.Close();
        cout << h.GetMean() << endl;
    }
*/
    {
        TFile f("test.root", "RECREATE");
        TH1F h("h","",10,0,10);
        h.Fill(3);
        f.mkdir("testDirA");
        f.cd("testDirA");
        h.Write();
        h.Write();
        f.mkdir("testDirB");
        f.cd("testDirB");
        h.Write();
        h.Write();
        f.Close();
    }
    {
        TFile f("test.root", "UPDATE");
        f.cd("testDirA");
        f.ls();
        f.Delete("h;1");
        f.ls();
        f.Close();
        f.Open("test.root", "READ");
        f.ls();
        f.Close();
    }
    {
        TFile f("test.root", "READ");
        f.cd("testDirA");
        f.ls();
        f.Close();
    }
    return;
}