Tic_Tac_Toe.cpp

#include<iostream>
#include<conio.h>
using namespace std;

char arr[3][3] = {{'1','2','3'}, {'4','5','6'},{'7','8','9'}};
char turn = 'X';
bool draw = false;

void display_board(){

    system("cls");

    cout<<"\t      |     |     "<<endl;
    cout<<"\t   "<<arr[0][0]<<"  |  "<<arr[0][1]<<"  |   "<<arr[0][2]<<"  "<<endl;
    cout<<"\t______|_____|_____"<<endl;
    cout<<"\t      |     |     "<<endl;
    cout<<"\t   "<<arr[1][0]<<"  |  "<<arr[1][1]<<"  |   "<<arr[1][2]<<"  "<<endl;
    cout<<"\t______|_____|_____"<<endl;
    cout<<"\t      |     |     "<<endl;
    cout<<"\t  "<<arr[2][0]<<"   |  "<<arr[2][1]<<"  |  "<<arr[2][2]<<"   "<<endl;
    cout<<"\t      |     |     "<<endl;

}

void player_turn(){

    int choice;
    int row;
    int column;

    if(turn=='X'){
        cout<<"\n\t player1 [X] turn: ";
    }
    if(turn=='O'){
        cout<<"\n\t player2 [O] turn: ";
    }
    cin>>choice;

    switch (choice)
    {
    case 1:
        row = 0; 
        column = 0;
        break;

    case 2:
        row = 0; 
        column = 1;
        break;

    case 3:
        row = 0; 
        column = 2;
        break;

    case 4:
        row = 1; 
        column = 0;
        break;

    case 5:
        row = 1; 
        column = 1;
        break;

    case 6:
        row = 1; 
        column = 2;
        break;

    case 7:
        row = 2; 
        column = 0;
        break;

    case 8:
        row = 2; 
        column = 1;
        break;

    case 9:
        row = 2; 
        column = 2;
        break;                                       
    
    default:
        cout<<"Invalid choice"<<endl;
        break;
    }

    if(turn=='X' && arr[row][column]!='X' && arr[row][column]!='O'){
        arr[row][column]='X';
        turn='O';
    }
    else if(turn=='O' && arr[row][column]!='X' && arr[row][column]!='O'){
        arr[row][column]='O';
        turn='X';
    }
    else{
        cout<<"\n enter another number"<<endl;
        player_turn();
    }

    display_board();
}

bool game_over(){

    // check win

    // horizontal win
    for(int i=0; i<3; i++){
        if(arr[i][0]==arr[i][1] && arr[i][0]==arr[i][2] && arr[i][0]=='X'){
            cout<<"\n\tPLAYER 1 WON !!"<<endl;
            return false;
        }
        else if(arr[i][0]==arr[i][1] && arr[i][0]==arr[i][2] && arr[i][0]=='O'){
            cout<<"\n\tPLAYER 2 WON !!"<<endl;
            return false;
        }
    }
    
    // vertical win
    for(int i=0; i<3; i++){
        if(arr[0][i]==arr[1][i] && arr[0][i]==arr[2][i] && arr[0][i]=='X'){
            cout<<"\n\tPLAYER 1 WON !!"<<endl;
            return false;
        }
        else if(arr[0][i]==arr[1][i] && arr[0][i]==arr[2][i] && arr[0][i]=='O'){
            cout<<"\n\tPLAYER 2 WON !!"<<endl;
            return false;
        }
    }
    
    //diagnol win
    for(int i=0; i<3; i++){
        if(arr[0][0]==arr[1][1] && arr[0][0]==arr[2][2] && arr[0][0]=='X'){
            cout<<"\n\tPLAYER 1 WON !!"<<endl;
            return false;
        }
        else if(arr[0][2]==arr[1][1] && arr[0][2]==arr[2][0] && arr[0][2]=='X'){
            cout<<"\n\tPLAYER 1 WON !!"<<endl;
            return false;
        }

        else if(arr[0][0]==arr[1][1] && arr[0][0]==arr[2][2] && arr[0][0]=='O'){
            cout<<"\n\tPLAYER 2 WON !!"<<endl;
            return false;
        }
        else if(arr[0][2]==arr[1][1] && arr[0][2]==arr[2][0] && arr[0][2]=='O'){
            cout<<"\n\tPLAYER 2 WON !!"<<endl;
            return false;
        }
        
    }

    //playing
    for(int i=0; i<3;i++){
        for(int j=0; j<3; j++){
            if(arr[i][j]!='X' && arr[i][j]!='O'){
                return true;
            }
        }
    }

    //draw
    draw = true;
    cout<<"\n\t GAME DRAW :( "<<endl;
    return false;

}

int main(){

    display_board();
    while(game_over()){

        player_turn();

    }

    cout<<"\n\n *** Hope you enjoyed playing it :) *** \n\n";

    getch();

    
    return 0;
}