Tic Tac Toe array wrong characters

Question

The screenshot says it all, the characters i use are correctly put inside the array. However, some other random characters are inserted in the array as well. I'm confused!

main.cpp :

#include "Players.h"
#include "GameLayout.h"
#include "Game.h"
#include <iostream>
#include <string>

using namespace std;

int main ()
{
    char gameBoard [3][3];
    cout << "**** Welcome to Leviathan's first TicTacToe Game! ****\n\n";
    Players playersObject;
    playersObject.getPlayersNames();
    playersObject.printPlayersNames();
    GameLayout gameObject;
    gameObject.printLayout();
    Game gamestartObject;
    gamestartObject.gameStart(gameBoard);
}

game.cpp :

#include "Players.h"
#include "GameLayout.h"
#include "Game.h"
#include <iostream>
#include <string>

using namespace std;

void Game::gameStart(char board[3][3])
{
    char player1char,player2char;
    size_t i,j;
    cout << "Enter player 1 character :";
    cin >> player1char;
    cout << "Enter player 2 character :";
    cin >> player2char;
    int row,column;
    bool isDone = false;
    while(isDone == false)
    {
        cout << "Player 1->choose row";
        cin >> row;
        cout << "Player 1->choose column";
        cin >> column;
        board[row-1][column-1] = player1char;
        cout << "Player 2->choose row";
        cin >> row;
        cout << "Player 2->choose column";
        cin >> column;
        board[row-1][column-1] = player2char;
        GameLayout layout;
        cout << "  |1||2||3|" <<endl;
        for(i=0; i<3; i++)
            {
                cout << i+1 << "|";
                for(j=0; j<3; j++)
                {
                    cout <<" "<<board[i][j] << " " ;
                }
                cout << endl;
            }
    }
}

Players.cpp :

#include "Players.h"
#include "GameLayout.h"
#include "Game.h"
#include <iostream>
#include <string>

using namespace std;


void Players::getPlayersNames()
{
    string p1,p2;
    cout << "Enter player 1 name : ";
    cin >> p1;
    cout << "\nEnter player 2 name : ";
    cin >> p2;
    _player1Name = p1;
    _player2Name = p2;
}

void Players::printPlayersNames()
{
    cout << "Alright " << _player1Name << " and " << _player2Name <<", the game has begun!\n\n";
}

GameLayout.cpp :

#include "Players.h"
#include "GameLayout.h"
#include "Game.h"
#include <iostream>
#include <string>

using namespace std;
void GameLayout::printLayout()
{
    size_t i,j;
    char board[3][3];
    for(i=0; i<3; i++)
    {
        for(j=0; j<3; j++)
        {
            board[i][j] = '.';
        }
    }
    cout << "  |1||2||3|" <<endl;
    for(i=0; i<3; i++)
    {
        cout << i+1 << "|";
        for(j=0; j<3; j++)
        {
            cout <<" "<<board[i][j] << " " ;
        }
        cout << endl;
    }
}

Game.h :

#ifndef GAME_H
#define GAME_H


class Game
{
    public:
        void gameStart(char board[3][3]);
    private:
};

#endif // GAME_H

GameLayout :

#ifndef GAMELAYOUT_H
#define GAMELAYOUT_H


class GameLayout
{
    public:
        void printLayout();
    private:
};

#endif // GAMELAYOUT_H

Players.h :

#ifndef PLAYERS_H
#define PLAYERS_H
#include <string>


class Players
{
    public:
        void getPlayersNames();
        void printPlayersNames();
    private:
        std::string _player1Name;
        std::string _player2Name;
};

#endif // PLAYERS_H

Answer 1

Local non-static variables in a function, like e.g. gameBoard, are not initialized. You need to explicitly initialize it, or its contents will be indeterminate and reading its values will lead to undefined behavior.

You can simply do it like

char gameBoard [3][3] = { ' ' };