TikTacToe

/* Online C++ Compiler and Editor */
#include <bits/stdc++.h>

using namespace std;

class Player{
    public:
        string name;
        char sign;
        Player(string name, char sign){
            this->name=name;
            this->sign=sign;
        }
};

class TikTacToe{
    int size,count=0;
    vector<vector<char>>board;
    deque<Player>players;
    public:
        TikTacToe(int size){
            this->size = size;
            board = vector<vector<char>>(size,vector<char>(size, '.'));
            Player p1 =  Player("player1",'X');
            Player p2 =  Player("player2",'O');
            players.push_back(p1);
            players.push_back(p2);
        }
        void StartGame();
        bool EnterValue(Player p);
        void PrintBoard();
        bool IsGameCompleted(int row, int col, Player p);
};

void TikTacToe::StartGame(){
    while(count<size*size){
        Player current = players.front();
        if(EnterValue(current)==false){
            break;
        }
        players.pop_front();
        players.push_back(current);
    }
}

bool TikTacToe::EnterValue(Player p){
    int row, col;
    cout<<p.name<<" please enter row and col\n";
    cin>>row>>col;
    if(row<0 || col<0 || row>=size || col>=size){
        cout<<"invalid index write again\n";
        return EnterValue(p);
    }
    if(board[row][col]!='.'){
        cout<<"value is already filled in index write again\n";
        return EnterValue(p);
    }
    board[row][col]=p.sign;
    PrintBoard();
    count++;

    if (IsGameCompleted(row,col,p)){
        cout<<p.name<<" won game";
        return false;
    }
    if(count==size*size){
        cout<<"withddraw game";
        return false;
    }

    cout<<endl;
    return true;
}

void TikTacToe::PrintBoard(){
    for(int i=0;i<size;i++){
        cout<<"|";
        for(int j=0;j<size;j++){
            cout<<board[i][j]<<"|";
        }
        cout<<"\n--------\n";
    }
}

bool TikTacToe::IsGameCompleted(int row, int col, Player p){
    bool valid=true;
    for(int i=0;i<size;i++){
        if(board[row][i]!=p.sign){
            valid=false;
            break;
        }
    }
    if(valid)return true;

    valid=true;
    for(int i=0;i<size;i++){
        if(board[i][col]!=p.sign){
            valid=false;
            break;
        }
    }
    if(valid)return true;

    valid=true;
    for(int i=0;i<size;i++){
        if(board[i][i]!=p.sign){
            valid=false;
            break;
        }
    }
    if(valid)return true;

    valid=true;
    for(int i=0;i<size;i++){
        if(board[i][size-i-1]!=p.sign){
            valid=false;
            break;
        }
    }
    if(valid)return true;
    return false;
}


int main()
{
   TikTacToe obj = TikTacToe(3);
   obj.StartGame();
   return 0;
}