/***************************************************************
* LinePlot.java
* Dean & Dean
*
* This program plots a line as a series of user-specified
* line segments.
***************************************************************/

import java.util.Scanner;

public class LinePlot
{
  private int oldX = 0;  // oldX and oldY save previous point
  private int oldY = 0;  // starting point is the origin (0,0)

  //************************************************************

  // This method prints description of a line segment from the
  // previous point to the current point.

  public void plotSegment(int x, int y)
  {
    System.out.println("New segment = (" + oldX + "," + oldY +
      ")-(" + x + "," + y + ")");
    oldX = x;
    oldY = y;
  } // end plotSegment

  //************************************************************

  public static void main(String[] args)
  {
    Scanner stdIn = new Scanner(System.in);
    LinePlot line = new LinePlot();
    String xStr, yStr;   // coordinates for point in String form
    int x, y;            // coordinates for point

    System.out.print("Enter x & y coordinates (q to quit): ");
    xStr = stdIn.next();
    while (!xStr.equalsIgnoreCase("q"))
    {
      yStr = stdIn.next();
      x = Integer.parseInt(xStr);
      y = Integer.parseInt(yStr);
      line.plotSegment(x, y);
      System.out.print("Enter x & y coordinates (q to quit): ");
      xStr = stdIn.next();
    } // end while
  } // end main
} // end class LinePlot