/*
  Lab exam 23/11/2004
  Solution Part 2
*/


public class UseCar {

  public static String longestRental(Car c1, Car c2) {
    if (c1.getDays() == 0 && c2.getDays() == 0)
      return null;
    else if (c1.getDays() >= c2.getDays())
      return c1.getPerson();
    else
      return c2.getPerson();
  }
}