#include "Riostream.h"
void basic() 
{
  ifstream in;
  in.open("ex.fvs");
  
  Float_t x,y,z;
  Int_t nlines = 0;
  TFile *f = new TFile("basic2.root","RECREATE");
  TH2F *h1 = new TH2F("h2","xy distribution",12,0,11,6,0,5);
  TNtuple *ntuple = new TNtuple("ntuple","data from ascii file","x:y:z");

  while (1) 
    {
    in >> x >> y >> z;
    if (!in.good()) break;
    h1->Fill(x,y);
    ntuple->Fill(x,y,z);
    nlines++;
    }
  printf(" found %d points\n",nlines);
  in.close();
  
  f->Write();
}