THIS IS FINAL COURSE ASSIGNMENT, FOLLOWING EVERY SINGLE REQUIREMENT IS CRUCIAL!
ID: 3845326 • Letter: T
Question
THIS IS FINAL COURSE ASSIGNMENT, FOLLOWING EVERY SINGLE REQUIREMENT IS CRUCIAL!
Hello, please help write TIC-TAC-TOE game in JAVA, where a human plays against the computer.
PROGRAM REQUIREMENTS:
1) The program prompts user for name and ensures (validates) it; user is allowed to enter a single username consisting of alpha chars ONLY.
2) Use one-dimensional arrays to keep track of the game and computer.
3) Use functions to pass arrays and implement other program requirements such as input validation, checking to ensure that places selected by users are available on the “game board”.
4) Validate user input at every opportunity:
• Do not allow number entries less than 0 or entries greater than 8 (in the case you are using numbers 0-8 on the “grid”.
• Do not allow number entries less than 0 or entries greater than 8 (in the case you are using numbers 1-9 on the “grid”.
• Do not allow non-numeric entries.
• Program must NOT crashes due to an invalid entry made by the user.
5) The program must be developed using functions so that the main() function consists mostly of function calls.
6) Below is a list of functions to use in the development of this project:
• splashScreen() //displays game and developer’s information
• askForUserNames() //requests for username
• validateUserName() //validate username
• resetGame() //reset the game when one concludes; this includes filling the array with vales 0-8
• displayGrid() //display the grid after each player makes a move
• playerMakeMove() //prompts player to make a move, invokes validatePlayersMove, checkPositionAvailability
• validatePlayersMove() //validates that user entry X is such that 0<=X<=8
• checkPositionAvailability() //check that the position selected by the user is available
• checkWin() //check for a winning player
• checkTie() //check for a tie
• makeBestMove() //select best option for computer
• computerMakeMove() //used to make the move, in other words populate the array
7) The main() function must use a loop to keep the user in the program until he/she wants to quit. Users should be allowed to play as many games as they want.
8) Meaningful variable names must be used.
9) Program must determine if a tie occurs
10) Program must detect a winner if there is one
11) Please use variables of the correct type and initialize them with a proper value.
12) Code SHOULD be properly commented
==================================================================
BELOW ARE THE SCREENSHOTS OF WORKING PROGRAM:
On the grid "H" stands for human move, "C" for computer move
TIC TAC TOE****** By Prof. Flores Press any key to continueExplanation / Answer
Here is the code for the game. Output is also shown. Please do rate the answer if it helped. Thank you very much.
import java.io.IOException;
import java.util.Random;
import java.util.Scanner;
public class TicTacToe {
private String username;
private Scanner input;
private char board[];
private Random random;
//constructor to initialize the scanner , board, random generator
public TicTacToe()
{
input = new Scanner(System.in);
board = new char[9];
random = new Random();
resetGame();
}
//displays the splash screen
public void splashScreen() throws IOException
{
System.out.println("********************************");
System.out.println("********************************");
System.out.println("********************************");
System.out.println("********* **********");
System.out.println("********* TIC TAC TOE **********");
System.out.println("********* **********");
System.out.println("********* **********");
System.out.println("********************************");
System.out.println("********************************");
System.out.println("********************************");
System.out.println(" Press any key to continue...");
input.nextLine();
}
//ask for valid user name. Username should be a single word with only alphabet chars only. If invalid
//input is given, user is repeatedly prompted to give valid input
public void askForUserName()
{
System.out.println("Player, enter your name");
while(true)
{
System.out.println("Enter a single word with alpha chars only!");
username=input.nextLine();
if(!validateUserName())
{
System.out.println("Invalid name");
}
else
break;
}
}
//function to check if the instance variable username is a valid username or not. Returns true if valid and
//false otherwise
private boolean validateUserName()
{
char ch;
if(username == null || username.equals("")) //check if null or empty string
return false;
for(int i=0;i<username.length();i++)
{
ch = username.charAt(i);
if(!(ch>='a' && ch<='z' || ch>='A' && ch<='Z')) //only lower case and upper case chars allowed
return false;
}
return true;
}
//resets the game, board is initialized again from 0-8
public void resetGame()
{
for(int i = 0; i < 9; i++)
board[i] = (char)(i + 48); //initialize using ascii value, numbers start from 48 for 0
}
//displays the board on screen after clearing the screen
public void displayGrid()
{
int idx;
try {
Runtime.getRuntime().exec("clear"); //try clear command (works on linux based system)
} catch (IOException e) {
try {
Runtime.getRuntime().exec("cls"); //if previous clear failed, try cls on windows system
} catch (IOException e1) {
}
}
System.out.println(" TIC-TAC-TOE");
for(int i=0;i<3; i++)
{
System.out.print(" |-----------|");
System.out.print(" | ");
for(int j = 0; j<3; j++)
{
idx = i * 3 + j;
System.out.print(board[idx]+" | ");
}
}
System.out.print(" |-----------| ");
}
//prompts the player for a move and validates his move i.e checks if input if in range 0-8.
//if valid , then checks if the specified position is available and not occupied yet.
//If available, then marks it with 'H' to indicate human move. Otherwise prompts user for
//a different position
public void playerMakeMove()
{
while(true)
{
System.out.println("It is "+username+"'s move");
System.out.println("Give me your best move!");
int move=input.nextInt();
if(validatePlayerMove(move))
{
if(checkPositionAvailability(move))
{
board[move] = 'H'; //make 'H' for player move
break;
}
else
{
System.out.println("Position not available. Make a different choice.");
continue;
}
}
else
{
System.out.println("Invalid entry!");
continue;
}
}
}
//checks if user's move is valid i.e in range 0-8
private boolean validatePlayerMove(int move)
{
if(move<0 || move >8)
return false;
else
return true;
}
//check if the specified
private boolean checkPositionAvailability(int move)
{
if(board[move]!='C' && board[move]!='H')
return true;
else
return false;
}
//checks if the board has a winner. Returns 'H' if human wins, 'C' if computer wins
//' ' if nobody has won
public char checkWin()
{
if(board[0]==board[1] && board[1]==board[2]) //check top horizontal line
return board[0];
else if(board[3]==board[4] && board[4]==board[5]) //check middle horizontal line
return board[3];
else if(board[6]==board[7] && board[7]==board[8])//check last horizontal line
return board[6];
else if(board[0]==board[3] && board[3]==board[6])//check left vertical line
return board[0];
else if(board[1]==board[4] && board[4]==board[7])//check middle vertical line
return board[1];
else if(board[2]==board[5] && board[5]==board[8])//check right vertical line
return board[2];
else if(board[0]==board[4] && board[4]==board[8])//check diagonal line from left top to right bottom
return board[0];
else if(board[2]==board[4] && board[4]==board[6]) //check diagonal from right top to left bottom
return board[2];
else
return ' ';
}
//checks if there is tie. Returns true if tie and false otherwise
public boolean checkTie()
{
//first see if all the positions are occupied or not
for(int i=0;i<9;i++)
{
if(board[i]!='C' && board[i]!='H')
return false;
}
//if all are occupied, now check winner, if ' ' is returned, then its a tie since already all positions are occupied
if(checkWin()==' ')
return true;
else
return false;
}
//makes a computer's move
public void computerMakeMove()
{
int move = makeBestMove();
board[move] = 'C';
}
//generates a random number in range 0-8 which is not yet occupied.
private int makeBestMove()
{
while(true)
{
int move = random.nextInt(9);
if(!checkPositionAvailability(move))
continue;
else
return move;
}
}
//returns the human player name
public String getUserName()
{
return username;
}
//prompts user if he wants to play again and returns true if user wants to continue and fals otherwise
public boolean playAgain()
{
System.out.println("Game over! Play again ? y/n: ");
input.nextLine();//flush newline from previous input for positions
if(input.nextLine().trim().equalsIgnoreCase("y"))
return true;
else
return false;
}
public static void main(String[] args) {
TicTacToe game=new TicTacToe();
char winner;
int turn=1;
try {
while(true) //keep repeating
{
game.splashScreen();
game.askForUserName();
while(true)
{
//check if already the game is over
winner = game.checkWin();
if(winner=='C' || winner=='H' || (winner == ' ' && game.checkTie()))
break;//break if game over
game.displayGrid();
if(turn == 1)
game.playerMakeMove();
else
game.computerMakeMove();
turn = 1 - turn;
}
//display game status
game.displayGrid();
if(winner == 'C')
System.out.println("Computer wins!");
else if(winner == 'H')
System.out.println("Player "+game.getUserName()+" wins!");
else
System.out.println("It's a tie!");
//ask if user wants to continue
if(game.playAgain())
{
game.resetGame();
turn = 1;
}
else
{
System.out.println("Thank you for playing TIC-TAC-TOE!");
break;
}
}
} catch (IOException e) {
System.out.println(e.getMessage());
}
}
}
output
********************************
********************************
********************************
********* **********
********* TIC TAC TOE **********
********* **********
********* **********
********************************
********************************
********************************
Press any key to continue...
Player, enter your name
Enter a single word with alpha chars only!
human
TIC-TAC-TOE
|-----------|
| 0 | 1 | 2 |
|-----------|
| 3 | 4 | 5 |
|-----------|
| 6 | 7 | 8 |
|-----------|
It is human's move
Give me your best move!
1
TIC-TAC-TOE
|-----------|
| 0 | H | 2 |
|-----------|
| 3 | 4 | 5 |
|-----------|
| 6 | 7 | 8 |
|-----------|
TIC-TAC-TOE
|-----------|
| 0 | H | 2 |
|-----------|
| 3 | 4 | C |
|-----------|
| 6 | 7 | 8 |
|-----------|
It is human's move
Give me your best move!
2
TIC-TAC-TOE
|-----------|
| 0 | H | H |
|-----------|
| 3 | 4 | C |
|-----------|
| 6 | 7 | 8 |
|-----------|
TIC-TAC-TOE
|-----------|
| 0 | H | H |
|-----------|
| 3 | 4 | C |
|-----------|
| C | 7 | 8 |
|-----------|
It is human's move
Give me your best move!
3
TIC-TAC-TOE
|-----------|
| 0 | H | H |
|-----------|
| H | 4 | C |
|-----------|
| C | 7 | 8 |
|-----------|
TIC-TAC-TOE
|-----------|
| 0 | H | H |
|-----------|
| H | C | C |
|-----------|
| C | 7 | 8 |
|-----------|
It is human's move
Give me your best move!
3
Position not available.
Make a different choice.
It is human's move
Give me your best move!
7
TIC-TAC-TOE
|-----------|
| 0 | H | H |
|-----------|
| H | C | C |
|-----------|
| C | H | 8 |
|-----------|
TIC-TAC-TOE
|-----------|
| 0 | H | H |
|-----------|
| H | C | C |
|-----------|
| C | H | C |
|-----------|
It is human's move
Give me your best move!
0
TIC-TAC-TOE
|-----------|
| H | H | H |
|-----------|
| H | C | C |
|-----------|
| C | H | C |
|-----------|
Player human wins!
Game over! Play again ? y/n:
y
********************************
********************************
********************************
********* **********
********* TIC TAC TOE **********
********* **********
********* **********
********************************
********************************
********************************
Press any key to continue...
Player, enter your name
Enter a single word with alpha chars only!
alice
TIC-TAC-TOE
|-----------|
| 0 | 1 | 2 |
|-----------|
| 3 | 4 | 5 |
|-----------|
| 6 | 7 | 8 |
|-----------|
It is alice's move
Give me your best move!
1
TIC-TAC-TOE
|-----------|
| 0 | H | 2 |
|-----------|
| 3 | 4 | 5 |
|-----------|
| 6 | 7 | 8 |
|-----------|
TIC-TAC-TOE
|-----------|
| 0 | H | 2 |
|-----------|
| 3 | C | 5 |
|-----------|
| 6 | 7 | 8 |
|-----------|
It is alice's move
Give me your best move!
5
TIC-TAC-TOE
|-----------|
| 0 | H | 2 |
|-----------|
| 3 | C | H |
|-----------|
| 6 | 7 | 8 |
|-----------|
TIC-TAC-TOE
|-----------|
| 0 | H | 2 |
|-----------|
| C | C | H |
|-----------|
| 6 | 7 | 8 |
|-----------|
It is alice's move
Give me your best move!
2
TIC-TAC-TOE
|-----------|
| 0 | H | H |
|-----------|
| C | C | H |
|-----------|
| 6 | 7 | 8 |
|-----------|
TIC-TAC-TOE
|-----------|
| C | H | H |
|-----------|
| C | C | H |
|-----------|
| 6 | 7 | 8 |
|-----------|
It is alice's move
Give me your best move!
8
TIC-TAC-TOE
|-----------|
| C | H | H |
|-----------|
| C | C | H |
|-----------|
| 6 | 7 | H |
|-----------|
Player alice wins!
Game over! Play again ? y/n:
n
Thank you for playing TIC-TAC-TOE!
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.