//*******************************************************************
//
//   File:    TestBox.java
//   Subject: CS-112 AS5 Solutions
//   Date:    April 09, 2001
//   Author:  Gabriel Loh
//   Classes: TestBox
//            Box
//
//*******************************************************************


//===================================================================
// CLASS TestBox creates a few different boxes, prints out
// some of their attributes, modifies one, and prints out
// some more attributes.
//===================================================================

public class TestBox
{
  /* This is the main provided from the as5 webpage */
  public static void main(String args[])
  {
    Box b1 = new Box();
    Box b2 = new Box(2);
    Box b3 = new Box(2,3,4);
    System.out.println("There were " + b1.count() + " boxes created.");
    System.out.println("The box volumes are: " 
       + b1.volume() + "," + b2.volume() + "," + b3.volume() + ".");
    b3.scale(3);
    System.out.println("The volume of box 3 is now: " 
                       + b3.volume() + ".");
    if (b2.cube()) System.out.println("Box 2 is a cube.");
    if (! b3.cube()) System.out.println("Box 3 is not a cube.");
  }
}  // end of class TestBox


//===================================================================
// CLASS Box describes a "rectangular prism" shape by the three
// sidelengths of the shape.  Constructors are provided for a
// unit cube, an arbitrarily sized cube, and a general "box".
// All sidelengths have integer values.
//===================================================================

class Box
{
  protected int x,y,z; // these are the side lengths of the box
  protected static int numBoxesCreated = 0;

  // create a unit box if no args given to constructor
  public Box()
  {
    x = 1;
    y = 1;
    z = 1;
    numBoxesCreated++;
  }

  // create a cube, all sides having length s
  public Box(int s)
  {
    x = s;
    y = s;
    z = s;
    numBoxesCreated++;
  }

  // create a box with the side lengths as specified
  public Box(int new_x, int new_y, int new_z)
  {
    x = new_x;
    y = new_y;
    z = new_z;
    numBoxesCreated++;
  }

  // return the volume of the box
  public int volume()
  {
    return mult3(x,y,z);  // volume is product of the three side lengths
  }

  // return the total number of boxes ever created
  public int count()
  {
    return numBoxesCreated;
  }

  // returns true if all side lengths are equal (i.e. x=y=z)
  public boolean cube()
  {
    return ((x==y) && (y==z));  // condition evaluates to a boolean
  }

  // multiplies each side by factor
  public void scale(int factor)
  {
    x *= factor;
    y *= factor;
    z *= factor;
  }

  // private helper method for multiplying three int's
  private int mult3(int a, int b, int c)
  {
    return a*b*c;
  }
  
}  // end of class Box