import java.io.*;
import com.mw.io.*;
import structure.*;

public class ListBuilder {
// Program to build a singly-linked list, from a series of
// words typed by the user, and then display it.
// The class SinglyLinkedListElement is used to supply the
// operations for linking list elements together.

	public static void main (String args[]) {

      SystemInput sysIn = new SystemInput();
      ReadStream r = new ReadStream();
      String s;      
      
      SinglyLinkedListElement head = null; // pointer to the first element
      int count = 0;                       // size of the list
      SinglyLinkedListElement member = null;      // next member to be inserted
      SinglyLinkedListElement previous = null;    // previous member inserted
      
      System.out.println("Enter a series of words, followed by Command-D");
      s = r.readString();
      while (! r.eof()) {
         // link s to the tail end of the list
         member = new SinglyLinkedListElement(s);
         if (head == null) 
            head = new SinglyLinkedListElement(null, member);
         else 
            previous.setNext(member);
         count++;
         // and prepare for linking the next line of input 
         previous = member;     
         s = r.readString();
      }
      
      // now display the list
      System.out.println("The words entered are:");
      member = head.next();
      while (member!=null) {
         System.out.println(member.value());
         member = member.next();
      } 
      System.out.println(count + " words were entered.");     
	}
}