/** I think it would be instructive to look at a Card constructor,
 *  that creates a card object, using just an integer as a parameter.
 *  This constructor would be useful when we want to shuffle cards,
 *  because a random number generator can give us a number 1-52, and
 *  we need to be able to determine from this number what the denomination
 *  and suit should be.
 *
 *  To make this procedure more efficient, we create a denom number and
 *  suit number.  And these 2 numbers will correspond to the denomination
 *  and suit we want.
 */
public class Card
{
  private char denom;
  private char suit;

  /** We assume that i is in the range 1-52.
   *  Because of the behavior of the % and / operators,
   *  the denom number will be:  1=ace, 2=two, ..., 12=queen, 0=king
   *  and the suit number will be 0=clubs up to 3=spades.
   *  We need to say (i-1) for calculating the suit number because
   *  we want the outcome to be in the range 0-3, and the king of spades,
   *  being card # 52, would have been 52/13 = 4.  The other kings would have
   *  been wrong too:  13 (king of clubs) would have been called a diamond.
   */
  public Card(int i)
  {
    int denomNum = i % 13;
    int suitNum = (i-1) / 13;

    switch(denomNum)
    {
      case  1 : denom = 'A'; break;
      case 10 : denom = 'T'; break;
      case 11 : denom = 'J'; break;
      case 12 : denom = 'Q'; break;
      case  0 : denom = 'K'; break;
      default : denom = (char) (denomNum + '0'); break;
    }
    switch(suitNum)
    {
      case 0 : suit = 'c'; break;
      case 1 : suit = 'd'; break;
      case 2 : suit = 'h'; break;
      case 3 : suit = 's'; break;
    }
  }
  public String toString()
  {
    return denom + "-" + suit;
  }
}