// file:    Square.java
// author:  Robert Keller
// purpose: One suare of a Grid


/**
 * a single Square of the grid
 */

class Square
{
/**
 * the contents of the Square
 */

int contents;


/**
 * coordinates of the parent of the Square, during searching
 */

Pair parent;


/**
 * Construct a square from specified contents.
 * @param the contents
 */

Square(int contents)
  {
  this.contents = contents;
  parent = null;
  }


/**
 * Return the contents of the Square.
 */

int get()
  {
  return contents;
  }


/**
 * Set the contents of the Square.
 */

void set(int contents)
  {
  this.contents = contents;
  }


/**
 * See if the Square contains specified contents.
 */

boolean contains(int value)
  {
  return contents == value;
  }


/**
 * Set the parent of this Square
 */

void setParent(Pair parent)
  {
  this.parent = parent;
  }


/**
 * Set if this Square has been visited.
 */

boolean isMarked()
  {
  return parent != null;
  }


}