/*
 * Computes busfares for the following categories:
 * Normal adult fare = $1
 * Age < 3: fare is zero
 * Age from 4 to 13: half the adult fare
 * Age 65 or older: 80% of the adult fare
 *
 * Uses an enumerated type for the age categories
 *
 * Author: Don Chamberlin, Feb. 2009
 */

import java.util.*;

class Busfare {

   enum Category {INFANT, CHILD, ADULT, SENIOR};

   /*
    * This driver program reads ages from the keyboard,
    * calls getFare(), and prints the age category and fare.
    */
   public static void main(String[] args) {
      Scanner scan = new Scanner(System.in);
      System.out.println("Enter your age, or 0 to stop");
      int age = scan.nextInt();
      Category c;
      double fare;
      while (age > 0) {
         if (age < 3) c = Category.INFANT;
         else if (age < 14) c = Category.CHILD;
         else if (age > 64) c = Category.SENIOR;
         else c = Category.ADULT;
         fare = getFare(c);
         System.out.println("Your category is " + c);
         System.out.printf("Your fare is $%4.2f\n", fare);
         System.out.println();
         System.out.println("Enter your age, or 0 to stop");
         age = scan.nextInt();
      }
   }  // end of main()
   
   /*
    * This method returns the busfare for a given category
    */
   static double getFare(Category c) {
      final double BASEFARE = 1.0;
      double fare = BASEFARE;
      switch (c) {
         case INFANT:
            fare = 0.0;
            break;
         case CHILD:
            fare = BASEFARE * 0.5;
            break;
         case SENIOR:
            fare = BASEFARE * 0.8;
      }
      return fare;
   }
}  // end of class Busfare