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Object-Oriented Design
The Game of War
Illustrate the process of designing an object-oriented solution to a small problem by simulating War, a twoperson game for children that uses a deck of playing cards. The rules of the game act as an initial specification of the problem. A card deck consists of 52 playing cards, each of which has a numeric value between 1 and 13, called the rank of the card, and one of four suits (clubs, diamonds, hearts, and spades).
The values 1, 11, 12, and 13 have special names: ace, jack, queen, and king, respectively.
To play the game we deal the entire deck of cards to two players.
Each player has a pile of 26 cards face down on the table. During a turn of the game, the players show the top cards from their piles, and the player with the higherranking card wins both of the cards, putting them faceup in a pile.
For the purpose of comparison, aces count as highest.
If the cards shown by the players have the same rank, each player places the number of cards equal to that rank face down on the table.
Copyright 2004 by Ken Slonneger
Object-Oriented Design
1
The last cards played by each player are turned over and compared.
The higher value wins all of the cards that have been played this turn.
If another tie occurs, the process is repeated.
When a player finishes playing all of the cards in his or her playing pile, the cards won in previous turns are turned over and become a new playing pile.
If either player cannot complete a turn for lack of cards, the other player wins the game.
The goal of this program is to simulate the playing of a game of War with two players, named Ernie and Burt.
Analysis
After reviewing the specification of the problem, several points need clarification.
1. Implied in the game is the fact that we need to shuffle the deck of cards before the cards are dealt to the players. 2. Note that each player has two piles of cards: The pile of cards from which the player
The Game of War
Illustrate the process of designing an object-oriented solution to a small problem by simulating War, a twoperson game for children that uses a deck of playing cards. The rules of the game act as an initial specification of the problem. A card deck consists of 52 playing cards, each of which has a numeric value between 1 and 13, called the rank of the card, and one of four suits (clubs, diamonds, hearts, and spades).
The values 1, 11, 12, and 13 have special names: ace, jack, queen, and king, respectively.
To play the game we deal the entire deck of cards to two players.
Each player has a pile of 26 cards face down on the table. During a turn of the game, the players show the top cards from their piles, and the player with the higherranking card wins both of the cards, putting them faceup in a pile.
For the purpose of comparison, aces count as highest.
If the cards shown by the players have the same rank, each player places the number of cards equal to that rank face down on the table.
Copyright 2004 by Ken Slonneger
Object-Oriented Design
1
The last cards played by each player are turned over and compared.
The higher value wins all of the cards that have been played this turn.
If another tie occurs, the process is repeated.
When a player finishes playing all of the cards in his or her playing pile, the cards won in previous turns are turned over and become a new playing pile.
If either player cannot complete a turn for lack of cards, the other player wins the game.
The goal of this program is to simulate the playing of a game of War with two players, named Ernie and Burt.
Analysis
After reviewing the specification of the problem, several points need clarification.
1. Implied in the game is the fact that we need to shuffle the deck of cards before the cards are dealt to the players. 2. Note that each player has two piles of cards: The pile of cards from which the player