Question

***Please develop the game in Java.

a) Develop a very simple Tic Tac Toe gaming software. If you want, you may take some code (with proper reference to the source from where it is taken - i.e., hackerrank or github) from an existing game implementation to extend/improve the functionalities. To develop a good quality software, you would like to follow a particular software engineering process or more than one process (waterfall, incremental, agile etc.) and choose an appropriate programming language.

b) To validate that your software is a good-quality software, you have to write automated tests for the software that you have developed. You can either implement the automated testing framework by your own or use any existing available tool. For example, in Java you may use separate Java class test files which can be compiled and run automatically using the Windows command-line scripting or Linux shell scripting. Alternatively, you may use any existing tool which can be integrated with your software. For example, in Java you may use JUnit.

Bonus: Develop the automated testing framework/tool by your own and it will be able to log/save the results and display them in a graphical format.

Answer 1

The java program is here. And also i have attached the screenshot of the program running with the answer.:

//program starts here:

import java.util.Scanner;
/**
* Tic-Tac-Toe: Two-player console, non-graphics, non-OO version.
* All variables/methods are declared as static (belong to the class)
* in the non-OO version.
*/
public class TTTConsoleNonOO2P {
// Name-constants to represent the seeds and cell contents
public static final int EMPTY = 0;
public static final int CROSS = 1;
public static final int NOUGHT = 2;

// Name-constants to represent the various states of the game
public static final int PLAYING = 0;
public static final int DRAW = 1;
public static final int CROSS_WON = 2;
public static final int NOUGHT_WON = 3;

// The game board and the game status
public static final int ROWS = 3, COLS = 3; // number of rows and columns
public static int[][] board = new int[ROWS][COLS]; // game board in 2D array
// containing (EMPTY, CROSS, NOUGHT)
public static int currentState; // the current state of the game
// (PLAYING, DRAW, CROSS_WON, NOUGHT_WON)
public static int currentPlayer; // the current player (CROSS or NOUGHT)
public static int currntRow, currentCol; // current seed's row and column

public static Scanner in = new Scanner(System.in); // the input Scanner

/** The entry main method (the program starts here) */
public static void main(String[] args) {
// Initialize the game-board and current status
initGame();
// Play the game once
do {
playerMove(currentPlayer); // update currentRow and currentCol
updateGame(currentPlayer, currntRow, currentCol); // update currentState
printBoard();
// Print message if game-over
if (currentState == CROSS_WON) {
System.out.println("'X' won! Bye!");
} else if (currentState == NOUGHT_WON) {
System.out.println("'O' won! Bye!");
} else if (currentState == DRAW) {
System.out.println("It's a Draw! Bye!");
}
// Switch player
currentPlayer = (currentPlayer == CROSS) ? NOUGHT : CROSS;
} while (currentState == PLAYING); // repeat if not game-over
}

/** Initialize the game-board contents and the current states */
public static void initGame() {
for (int row = 0; row < ROWS; ++row) {
for (int col = 0; col < COLS; ++col) {
board[row][col] = EMPTY; // all cells empty
}
}
currentState = PLAYING; // ready to play
currentPlayer = CROSS; // cross plays first
}

/** Player with the "theSeed" makes one move, with input validation.
Update global variables "currentRow" and "currentCol". */
public static void playerMove(int theSeed) {
boolean validInput = false; // for input validation
do {
if (theSeed == CROSS) {
System.out.print("Player 'X', enter your move (row[1-3] column[1-3]): ");
} else {
System.out.print("Player 'O', enter your move (row[1-3] column[1-3]): ");
}
int row = in.nextInt() - 1; // array index starts at 0 instead of 1
int col = in.nextInt() - 1;
if (row >= 0 && row < ROWS && col >= 0 && col < COLS && board[row][col] == EMPTY) {
currntRow = row;
currentCol = col;
board[currntRow][currentCol] = theSeed; // update game-board content
validInput = true; // input okay, exit loop
} else {
System.out.println("This move at (" + (row + 1) + "," + (col + 1)
+ ") is not valid. Try again...");
}
} while (!validInput); // repeat until input is valid
}

/** Update the "currentState" after the player with "theSeed" has placed on
(currentRow, currentCol). */
public static void updateGame(int theSeed, int currentRow, int currentCol) {
if (hasWon(theSeed, currentRow, currentCol)) { // check if winning move
currentState = (theSeed == CROSS) ? CROSS_WON : NOUGHT_WON;
} else if (isDraw()) { // check for draw
currentState = DRAW;
}
// Otherwise, no change to currentState (still PLAYING).
}

/** Return true if it is a draw (no more empty cell) */
// TODO: Shall declare draw if no player can "possibly" win
public static boolean isDraw() {
for (int row = 0; row < ROWS; ++row) {
for (int col = 0; col < COLS; ++col) {
if (board[row][col] == EMPTY) {
return false; // an empty cell found, not draw, exit
}
}
}
return true; // no empty cell, it's a draw
}

/** Return true if the player with "theSeed" has won after placing at
(currentRow, currentCol) */
public static boolean hasWon(int theSeed, int currentRow, int currentCol) {
return (board[currentRow][0] == theSeed // 3-in-the-row
&& board[currentRow][1] == theSeed
&& board[currentRow][2] == theSeed
|| board[0][currentCol] == theSeed // 3-in-the-column
&& board[1][currentCol] == theSeed
&& board[2][currentCol] == theSeed
|| currentRow == currentCol // 3-in-the-diagonal
&& board[0][0] == theSeed
&& board[1][1] == theSeed
&& board[2][2] == theSeed
|| currentRow + currentCol == 2 // 3-in-the-opposite-diagonal
&& board[0][2] == theSeed
&& board[1][1] == theSeed
&& board[2][0] == theSeed);
}

/** Print the game board */
public static void printBoard() {
for (int row = 0; row < ROWS; ++row) {
for (int col = 0; col < COLS; ++col) {
printCell(board[row][col]); // print each of the cells
if (col != COLS - 1) {
System.out.print("|"); // print vertical partition
}
}
System.out.println();
if (row != ROWS - 1) {
System.out.println("-----------"); // print horizontal partition
}
}
System.out.println();
}

/** Print a cell with the specified "content" */
public static void printCell(int content) {
switch (content) {
case EMPTY: System.out.print(" "); break;
case NOUGHT: System.out.print(" O "); break;
case CROSS: System.out.print(" X "); break;
}
}
}