include <EfficientCarMilesEstimator.h>
  include <iostream>
  
  using namespace std;
  
  int main(int argc, char** argv)
  {
    MilesEstimator myMilesEstimator;
    
    myMilesEstimator.setGallonsLeft(2);
    cout << "Normal estimator can go " << myMilesEstimator.getMilesLeft() << " more miles." << endl;
    
    EfficientCarMilesEstimator myEstimator;
    
    myEstimator.setGallonsLeft(2);
    cout << "Efficient estimator can go " << myEstimator.getMilesLeft() << " more miles." << endl;
  }