Merge pull request #148 from Nokia-A6/main

Added Tic Tac Toe game using java

Author: kishanrajput23

TicTacToe/TicTacToe.java

@@ -0,0 +1,94 @@
+import java.util.Scanner;
+
+public class TicTacToe{
+    public static void main(String[] args){
+        char[][] board = new char[3][3];
+        initialize(board);
+        startGame(board, 'X');
+    }
+
+    public static void initialize(char[][] board){
+        for(int row=0;row<board.length;row++){
+            for(int col=0;col<board[0].length;col++){
+                board[row][col] = ' ';
+            }
+        }
+    }
+
+    public static void printBoard(char[][] board){
+        for(int row=0;row<board.length;row++){
+            System.out.println("-----------");
+            for(int col=0;col<board[0].length;col++){
+                System.out.print(board[row][col] + " | ");
+            }
+            System.out.println();
+        }
+        System.out.println("-----------");
+    }
+
+    public static void startGame(char[][] board, char player){
+        int c = 0;
+        boolean gameOver = false;
+        Scanner input = new Scanner(System.in);
+
+        while(!gameOver){
+            
+            if(c == board.length * board.length){
+                    System.err.println("Match Draw");
+                    break;
+            }
+            printBoard(board);
+            
+            System.out.print("Player " + player + " Enter position: ");
+            int row = input.nextInt();
+            int col = input.nextInt();
+            System.out.println();
+
+            if(board[row][col] == ' '){
+                board[row][col] = player;
+                c++;
+                gameOver = haveWon(board, player);
+
+                if(gameOver){
+                    System.out.println("Player " + player + " has won!");
+                }
+                else{
+                    player = (player == 'X') ? 'O' : 'X';
+                }
+            }
+            else{
+                System.err.println("Invalid Position. Try Again!");
+            }
+        }
+        printBoard(board);
+
+    }
+
+    public static boolean haveWon(char[][] board, char player){
+        // row
+        for(int row=0;row<board.length;row++){
+            if(board[row][0] == player && board[row][1] == player && board[row][2] == player){
+                return true;
+            }
+        }
+
+        // column
+        for(int col=0;col<board[0].length;col++){
+            if(board[0][col] == player && board[1][col] == player && board[2][col] == player){
+                return true;
+            }
+        }
+
+        // diagonal
+        if (board[0][0] == player && board[1][1] == player && board[2][2] == player) {
+            return true;
+        }
+
+        if (board[0][2] == player && board[1][1] == player && board[2][0] == player) {
+            return true;
+        }
+
+        return false;
+    }
+
+}