// HW08_2b.java
// Tim Hilby
// Created on April 12, 2006
import java.util.Scanner;

public class HW08_2b
{
   // reverse the given line recursively
   public static String revline(String line)
   {
      if (line.length() == 0)
      {
         // trivial base case
         return "";
      }
      else
      {
         // take the first character
         // and add to the end of the
         // rest of the reversed string
         return (revline(line.substring(1))
                       + line.charAt(0));
      }
   }
   
   public static void main(String[] args)
   {
      Scanner scan = new Scanner(System.in);
      
      System.out.print("This program reverses ");
      System.out.println("an entire line of input.");
      
      String line = "";
      System.out.println("Type in your line below:");
      System.out.println("(enter in a blank line to quit)");
      line = scan.nextLine();
      while (line.length() > 0)
      {
         System.out.println("Reversed version:");
         System.out.println(revline(line));
         System.out.println("Next line (leave blank to quit):");
         line = scan.nextLine();
      }
   }
}