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Monday, 27 February 2017

Chapter 29 Exercise 7, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

29.7 (Weighted 4 * 4 16 tails) Revise Listing 29.9, WeightedNineTail.java, for the
weighted 4 * 4 16 tails problem. Your program should read the model object
created from the preceding exercise.


import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.util.Scanner;

public class Exercise07 {

 public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException {
  // Prompt the user to enter nine coins H and T's
  System.out.print("Enter the initial nine coins Hs and Ts: ");
  @SuppressWarnings("resource")
  Scanner input = new Scanner(System.in);
  String s = input.nextLine();
  char[] initialNode = s.toCharArray();

  ObjectInputStream objectInput = new ObjectInputStream(new BufferedInputStream(new FileInputStream(new File("tmp/WeightedTailModel16.dat"))));
  Exercise06.WeightedTailModel16 model = (Exercise06.WeightedTailModel16) objectInput.readObject();
  objectInput.close();
  java.util.List<Integer> path = model.getShortestPath(Exercise06.TailModel16.getIndex(initialNode));

  if(path != null) {
   System.out.println("The steps to flip the coins are ");
   for (int i = 0; i < path.size(); i++)
    Exercise06.TailModel16.printNode(Exercise06.TailModel16.getNode(path.get(i).intValue()));
   System.out.println("The number of flips is " + model.getNumberOfFlips(Exercise06.TailModel16.getIndex(initialNode)));
  } else {
   System.out.println("No solution");
  }
 }
}

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