#include <iostream>
#include <sstream>

// from ROOT
#include "TFile.h"
#include "TMath.h"
#include "TF1.h"

void EvaluateFormulas(){

  TFile testfile("testfile.root", "read");

  TF1 f1 = *((TF1*)testfile.Get("f1"));
  f1.Print("V");
  std::cout << "function value of f1 at x = 1 is " << f1.Eval(1) << std::endl;

  TF1* f2 = (TF1*)testfile.Get("f2");
  f2->Print("V");
  std::cout << "function value of f2 at x = 1 is " << f2->Eval(1) << std::endl;

  testfile.Close();
}