# Card_ADT.txt
ADT Card:
    A simple playing card. A Card is characterized by two components:
    rank: an integer value in the range 1-13, inclusive (Ace-King)
    suit: a character in 'cdhs' for clubs, diamonds, hearts, and
          spades.

Operations:
    
    create(rank, suit):
        Create a new Card
        pre: rank in range(1,14) and suit in 'cdhs'
        post: returns a Card of the given rank and suit

    suit():
        Card suit
        post: Returns Card's suit as a single character

    rank():
        Card rank
        post: Returns Card's rank as an int
        
    suitName():
        Card suit name
        post: Returns one of ('clubs', 'diamonds', 'hearts',
              'spades') corrresponding to Card's suit.

    rankName():
        Card rank name
        post: Returns one of ('ace', 'two', 'three', ..., 'king')
              corresponding to Card's rank.

    toString():
        String representation of Card
        post: Returns string naming the Card, e.g. 'Ace of Spades'