# Coding Challenge Day-27: Problem 1: TicTacToe Game

Hello! So I’m doing a 30 day coding challenge where I solve a few questions every day and thought of posting them here on my blog so that you guys can join the challenge too!

Welcome to Coding challenge Day 27: Problem 1! Be sure to post your answers, queries etc in the comments!

Problem: Write a program to simulate TicTacToe Game

Solution:

I learnt to make this game from here (though I have some variations in my version!):

My version has some shortcomings, but here’s what I came up with:

``````package Games;

import java.util.Scanner;

public class TicTacToe {

public static void display(char[][] gameboard) {
for (char[] c : gameboard) {
for (char s : c) {
System.out.print(s);
}
System.out.println();
}
}

public static void place(char[][] gameboard, int pos, String user) {
char symbol;

if(user.equals("player")){
symbol='X';
} else {
symbol='O';
}

switch (pos) {
case 1: gameboard[0][0]= symbol;
break;
case 2: gameboard[0][2]= symbol;
break;
case 3: gameboard[0][4]= symbol;
break;
case 4: gameboard[2][0]= symbol;
break;
case 5: gameboard[2][2]= symbol;
break;
case 6: gameboard[2][4]= symbol;
break;
case 7: gameboard[4][0]= symbol;
break;
case 8: gameboard[4][2]= symbol;
break;
case 9: gameboard[4][4]= symbol;
break;
}
}

public static String check_winner (char [][] gameboard){
String winner=null;

if(gameboard[0][0]=='X' && gameboard[0][2]=='X' && gameboard[0][4]=='X' ||
gameboard[2][0]=='X' && gameboard[2][2]=='X' && gameboard[2][4]=='X' ||
gameboard[4][0]=='X' && gameboard[4][2]=='X' && gameboard[4][4]=='X' ||
gameboard[0][0]=='X' && gameboard[2][0]=='X' && gameboard[4][0]=='X' ||
gameboard[0][2]=='X' && gameboard[2][2]=='X' && gameboard[4][2]=='X' ||
gameboard[0][4]=='X' && gameboard[2][4]=='X' && gameboard[4][4]=='X' ||
gameboard[0][0]=='X' && gameboard[2][2]=='X' && gameboard[4][4]=='X' ||
gameboard[4][0]=='X' && gameboard[2][2]=='X' && gameboard[0][4]=='X')
winner= "player";

else if(gameboard[0][0]=='O' && gameboard[0][2]=='O' && gameboard[0][4]=='O' ||
gameboard[2][0]=='O' && gameboard[2][2]=='O' && gameboard[2][4]=='O' ||
gameboard[4][0]=='O' && gameboard[4][2]=='O' && gameboard[4][4]=='O' ||
gameboard[0][0]=='O' && gameboard[2][0]=='O' && gameboard[4][0]=='O' ||
gameboard[0][2]=='O' && gameboard[2][2]=='O' && gameboard[4][2]=='O' ||
gameboard[0][4]=='O' && gameboard[2][4]=='O' && gameboard[4][4]=='O' ||
gameboard[0][0]=='O' && gameboard[2][2]=='O' && gameboard[4][4]=='O' ||
gameboard[4][0]=='O' && gameboard[2][2]=='O' && gameboard[0][4]=='O')
winner= "computer";

return winner;
}

public static int check_game(char [][] gameboard){
int a=0;
for(char[] c: gameboard){
for(char ch: c){
if(ch!=' ')
a++;
}
}

return a;
}

public static void main(String[] args) {
char[][] gameboard = { { ' ', '|', ' ', '|', ' ' },
{ '-', '+', '-', '+', '-' }, { ' ', '|', ' ', '|', ' ' },
{ '-', '+', '-', '+', '-' }, { ' ', '|', ' ', '|', ' ' } };
int userpos[]= new int[5];
int a=-1, rand=0;
System.out.println("Welcome to TicTacToe Simulation!p");
boolean status=true;

while(status && a<5){
a++;
Scanner obj = new Scanner(System.in);
display(gameboard);

System.out.println("Enter placement (1-9)");
int playerpos = obj.nextInt();
userpos[a]=playerpos;
place(gameboard, playerpos, "player");

boolean found=false;
while (!found){
found=true;
rand= (int)(Math.random()*10);
for(int i: userpos){
if(rand==i)
found=false;
}
}
place(gameboard, rand, "computer");

String str= check_winner(gameboard);
if(str!=null){
display(gameboard);
System.out.println("The Winner is : " + str);
status= false;
}

if(check_game(gameboard)==9)
status=false;
}

System.out.println("Thanks for playing!");

}

}
``````