#include <iostream>
#include <iomanip>

#include "TROOT.h"
#include "TFile.h"
#include "TH1F.h"
#include "TF1.h"

using namespace std;

static TFile* outfile;
static TH1F* hist;

void myatexit()
{
  cout<<"---------------------------------------- atexit"<<endl;

  gROOT->GetListOfFiles()->ls();
  if(outfile != NULL)
    {
      if(outfile->IsOpen() && !outfile->IsZombie())
	{
	  outfile->Print();

	  hist->Write();
	  outfile->Close();
	}
    }
}

int main(int argc, char* argv[])
{
  atexit(myatexit);

  outfile = new TFile("atexit.root","recreate");

  hist = new TH1F("hist","hist",100,0,100);

  gDebug = 1;

  gROOT->GetListOfFiles()->ls();
  outfile->Print();

  return 0;
}