int TH1exampl1.C()
{

  TH1F *hist = new TH1F("hist","TH1 example",100,0.0,100.0);  
  for(i=0;i<10;i++){	
    if(i<3) x=4;
    if(i>3 && i<=6) x=8;
    if(i>6) x=3;
    hist->Fill(x);
  }
  hist->Draw();

}