/** Representation of a pet for a pet store simulation */
public abstract class Pet {
  // instance variables
  private double weight;           // pet weight in pounds
  private String name;             // name of pet
  
  /** Construct a new pet with the given name and weight */
  public Pet(String name, double weight) {
    this.name = name;
    this.weight = weight;
  }
  
  /** Return this pet's name */
  public String getName() {
    return name;
  }
  
  /** Return this pet's weight */
  public double getWeight() {
    return weight;
  }
  
  /** Eat the supplied food */
  public void eat(String food) {
    System.out.println("Yum!  I love " + food);
  }
  
  /** Respond with the noise made by this pet 
   *  (Must be overridden in extended classes) */
  public abstract String speak();
}