用面向對象思想設計奧賽羅遊戲

剖析：

奧賽羅有以下主要步驟:
1. Game()爲主函數，來管理遊戲中的全部活動
2.構造函數對遊戲進行初始化
3.獲取第一個玩家的輸入
4.驗證輸入
5.更改棋盤格局
6.檢驗是否有人獲勝了
7.獲取第二個玩家的輸入

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public class Question {     private final int white = 1;     private final int black = 2;     private int[][]  board;       /* Sets up the board in the standard othello starting positions,      * and starts the game */       public void start () { ... }       /* Returns the winner, if any. If there are no winners, returns      * 0 */       private int won() {     if (!canGo (white) && !canGo (black)) {       int count = 0;         for (int i = 0; i < 8; i++) {           for (int j = 0; j < 8; j++) {             if (board [i] [j] == white) {               count++;             }               if (board [i] [j] == black) {               count--;             }           }           }           if (count > 0) return white;           if (count < 0) return black;           return 3;       }       return 0;     }       /* Returns whether the player of the specified color has a valid      * move in his turn. This will return false when      * 1. none of his pieces are present      * 2. none of his moves result in him gaining new pieces      * 3. the board is filled up      */     private boolean canGo(int color) { ... }       /* Returns if a move at coordinate (x,y) is a valid move for the      * specified player */     private boolean isValid(int color, int x, int y) { ... }       /* Prompts the player for a move and the coordinates for the move.      * Throws an exception if the input is not valid or if the entered      * coordinates do not make a valid move. */     private void getMove (int color) throws Exception { ... }       /* Adds the move onto the board, and the pieces gained from that      * move. Assumes the move is valid. */     private  void add (int x, int y, int  color) { ... }       /* The actual game: runs continuously until a player wins */       private void game() {         printBoard();       while (won() == 0) {           boolean valid = false;           while (!valid) {           try {               getMove(black);               valid = true;           } catch (Exception e) {               System.out.println (「Enter a valid coordinate!」);           }           }           valid = false;           printBoard();           while (!valid) {           try {               getMove(white);               valid = true;           } catch (Exception e) {               System.out.println (「Enter a valid coordinate!」);           }           }           printBoard ();       }         if (won()!=3) {         System.out.println (won () == 1 ? 「white」 : 「black」 +                    「 won!」);       } else {         System.out.println(「It’s a draw!」);         }     }   }   參考：http://wenku.baidu.com/view/47eda066f8c75fbfc67db27f.html