Components of the Game

The game is made of the following components that include the functions and data structures to provide the basic operations of the game.

1. Game Board

To create a tic-tac-toe board, a 3 x 3 array initialized with space is used.

char board[3][3] = {{' ', ' ', ' '}, {' ', ' ', ' '}, {' ', ' ', ' '}};

In this array, we will fill the X and O characters based on the moves of the players.

2. Movement Of Player

Now we will create a function drawBoard() to display the Board. It will initialize the array and display the board after each move.

The logic for user input and valid input checking is defined inside the main() function itself.

How to check if the input is valid or not?

• Valid input: If the cell is empty and is within the boundary
• Invalid input: If the cell has already been filled with another letter or is outside the bounds.

3. Win, Lose or Draw

The checkWin() function is used to check whether the player has won or not. The draw condition is checked in the main() function.

In this article, we will learn how to develop a tic-tac-toe game in C++. Tic-tac-toe is a game played between two players usually with paper and pencil but here, we will create a C++ program that will display the game on the console screen and players can use different keys from the keyboard to play it.

Before we start, let’s understand some rules to play the game: