//
// hw2pr2.java
// name:
// 

import java.util.Scanner;   // input library

/*
 * This class, named Point, is a data structure
 * representing 2d points :-)
 */
class Point
{
  // the data members that make up Points
  private double x;
  private double y;

  // a zero-input constructor
  public Point( )
  {
    // call the two-input constructor with 0.0 and 0.0!
    this(0.0,0.0);
  }
  
  // a constructor that creates Points from an
  // x-coordinate and a y-coordinate
  public Point( double xcoord, double ycoord )
  {
    this.x = xcoord;  // the constructor sets the values
    this.y = ycoord;  // for the data members, x and y
  }
  
  // a method (function) that prints Points
  public String toString()  // it's always named toString
  {
    String result = "(" + this.x + "," + this.y + ")";
    return result;
  }
  
  // a method (function) that returns the Manhattan distance
  // between the calling Point (this) and the input Point (p)
  public double manhattan_distance(Point p)
  {
    double x_difference = Math.abs( this.x - p.x );
    double y_difference = Math.abs( this.y - p.y );
    return x_difference + y_difference;
  }
  
  // The "main" method (function) is where the program
  // always begins its execution. Other methods will be
  // called as needed. Here, we don't use the command-line
  // inputs, named "args"
  public static void main(String[] args)
  {
    System.out.println("Hello from Java!"); // hi!
    Scanner inputter = new Scanner( System.in ); // input setup
    
    System.out.print("Type an x-coordinate: ");
    double xcoord = inputter.nextDouble();
    
    System.out.print("Type a  y-coordinate: ");
    double ycoord = inputter.nextDouble();
    
    // create an object, named p1, of type Point:
    Point p1 = new Point( xcoord, ycoord );
    
    // do it all again for a second object (p2) of type Point
    System.out.print("Type another x-coordinate: ");
    xcoord = inputter.nextDouble();
    
    System.out.print("Type another y-coordinate: ");
    ycoord = inputter.nextDouble();
    
    // our second object, named p2, of type Point:
    Point p2 = new Point( xcoord, ycoord );
    
    // now print both Points and their Manhattan distance
    System.out.println("Point p1 is " + p1.toString());
    System.out.println("Point p2 is " + p2.toString());
    double mdist = p1.manhattan_distance(p2);
    System.out.println("Their manhattan distance is " + mdist);
    
    // and conclude with an appropriate message...
    if ( mdist > 42.0 ) 
    {
      System.out.println("Too far!");
    }
    else if ( mdist < 42.0 )
    {
      System.out.println("Too close!");
    }
    else
    {
      System.out.println("Perfect!");
    }
  } // end of the main method
    
} // end of the Point class