import java.io.*;

public class Book{

private String title;
private String author;
private int pages;


public Book(String t)
 {
}


public Book(String t, String a)
 {
 }

public Book(String t, String a, int p)
 {
 }


public double getAuthor()
 {
 }

public void printAuthor()
{}

public String getTitle()
 {
}

public void printTitle()
{
}

public void changePages(int n)
 {
}

public void changeAuthor(String n)
 {
}

}