#ifndef BANKCARD_H_
#define BANKCARD_H_

/**
 * A bank card.  Each card is associated with an account.
 * Given a card, it is not possible to determine the account number.
 * It is possible to compare two cards and determine if they are for the same account.
 * 
 * This is an implementation of a bank card as described in Kleinberg & Tardos, Chapter 5, Problem 3.
 * @author Barbara Lerner
 *
 */
class BankCard
{
public:
	/**
	 * Create a card for an account
	 * @param acct the account the card is for
	 */
	BankCard(int acct);
	
	/**
	 * Delete the bank card
	 */
	virtual ~BankCard();

	/**
	 * Compare two cards. 
	 * @param o the other card
	 * @return true if the other card and this card are for the same account.
	 */
	virtual bool operator== (BankCard const& o);

private:
	/** The account that the card is for.  There is intentionally no getter or setter
	 *  for this field.  (Pretend it is encrypted.)
	 */
	int account;
};

#endif /*BANKCARD_H_*/