will implement a board game called Lines of Action which is played on an 8 × 8 board by two players Black and White. pdf files for the details, specific requirements and restrictions.

INSTRUCTIONS TO CANDIDATES

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Project: Lines of Action

Introduction

The objective of this project is to practice object-oriented programming. You will implement a board game called Lines of Action ( 集 結 棋 ), which is played on an 8 × 8 board by two players Black and White. The initial game setup is shown in Figure 1(a). The symbols ‘B’, ‘W’, and ‘.’ denote black piece, white piece, and empty square respectively. The rows and columns are numbers 0–7 and lowercase letters a–h respectively.

Two players take turns to move one of their pieces horizontally ↔, vertically ↕, or diagonally ⤡⤢. The piece moves exactly as many squares as there are pieces on the line in which it is moving. E.g., the B in a1 may move two squares to c1, because there are totally two pieces on row 1. A piece may jump over pieces of the same player but not over opponent’s pieces (Figure 1(b)). A piece may land on and capture an opponent’s piece, which will then be removed from the board (Figure 1(c)). A piece may not land on a piece of the same player. The goal of a player is to make all his/her pieces adjacent to each other vertically, horizontally, and diagonally (Figure 1(d)).

 

		a	b	c	d	e	f	g	h		01234567	a. B. B B B B.	b cW .. .. W.✓.. .. .. .W W		d W......W	e W. B×....W	f W......W	g W......W	h. B B B B B B.
	0	.	W	W	W	W	W	W	.
	1	B	.	.	.	.	.	.	B
	2	B	.	.	.	.	.	.	B
(a)	3	B	.	.	.	.	.	.	B	(b)
	4	B	.	.	.	.	.	.	B
	5	B	.	.	.	.	.	.	B
	6	B	.	.	.	.	.	.	B
	7	.	W	W	W	W	W	W	.
		a	b	c	d	e	f	g	h			a	b	c	d	e	f	g	h
	0	.	W	.	W	.	W	W	.		0	.	.	.	.	.	.	.	.
	1	B	.	.	.	.	.	.	B		1	.	.	.	.	W	.	W	.
	2	.	.	W	.	.	.	.	B		2	.	.	.	.	W	W	.	W
(c)	3	B	W	.	.	.	.	.	B	(d)	3	.	.	.	.	.	.	.	.
	4	B	.	B	.	.	.	.	B		4	W	.	W	B	.	W	B	W
	5	B	.	.	.	.	.	.	B		5	.	W	B	.	B	B	B	B
	6	B	.	.	.	. B.		.	B		6	B	B	W	.	.	.	.	.
	7	.	W	W	W	W	W/	W	.		7	.	.	.	.	.	.	.	.

 

Figure 1: (a) Initial setup, (b) Jump over, (c) Capture, and (d) Black wins

 Sometimes a player’s move may result in the opponent forming all adjacent pieces due to capture. This commits suicide and the opponent wins. A move may also result in both players forming all adjacent pieces. Such simultaneous connection is considered as a draw. A player with only one piece left (due to captures) is by definition connected. A player may also have no possible moves; but we simply assume this will not happen in this project.

Program Specification

You have to write your program in two source files LinesOfAction.cpp and gameplay.cpp. The former is the implementation of the class LinesOfAction, while the latter is a client program of class LinesOfAction which performs the game flow. You are recommended to finish the LinesOfAction class first before writing the client program. When you write the LinesOfAction class, implement the member functions and test them individually one by one. Your two files will be graded separately, so you should not mix the functionalities of the two files.

 Class LinesOfAction (LinesOfAction.cpp)

You are given the interface of the LinesOfAction class in the header file LinesOfAction.h. You

shall not modify the contents of this header file. Descriptions of its members are given below.

class LinesOfAction { public:

LinesOfAction(); void printGame();

char getCurrentPlayer(); void swapPlayer();

bool move(string from, string to); bool hasConnected(char p);

char gameOver(); private:

char board[8][8];

char currentPlayer, nextPlayer; int blacks, whites;

};

Private Data Members

 char board[8][8];

The game board is represented by a two-dimensional array of char, storing either ‘B’, ‘W’, or ‘.’. The elements board[0][0], board[0][7], board[7][0], and board[7][7] are the positions a0 h0, a7 and h7 respectively.

char currentPlayer, nextPlayer;

The player in the current move and in the next move respectively. They should be either ‘B’ or ‘W’.

int blacks, whites;

The total number of black and white pieces on the board respectively.

Public Constructor and Member Functions

 LinesOfAction();

This constructor creates a game object and initialize it to the setup in Figure 1(a). Black starts playing first. (So White is the next player.) There are 12 black and white pieces each on the board initially.

void printGame();

Prints out the game board in the format in Figure 1.

char getCurrentPlayer();

Returns the current player of the game, i.e., the value of the data member currentPlayer.

void swapPlayer();

Swaps the current and next players in the game. This is for changing turns during the game play.

 

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