This course will teach beginner-level coders to build the classic game Tic-Tac-Toe in C++ using a modular programming method.

cpp.tar.gz

After learning the basics of C++, it’s a great idea to complete at least one hands-on project where you can build something from scratch using C++. This course offers the opportunity to build the basic but classic Tic-Tac-Toe game, command-line style.

You’ll begin the course by looking at the end product and then building the game step-by-step, adding one tiny feature in each lesson. This way, you’ll add one or two helper functions to the codebase and then test them individually in the main controller function. Because of this modular approach, you’ll finish coding the game efficiently and professionally.

By the end of the course, you’ll have one complete hands-on project in C++ added to your profile.

Tic-Tac-Toe with C++

# What we have
We have completed all the steps to be able to play the game.

Considering these steps, we won’t be able to end the game because there is still no check when the game will end.

# Requirements of this module
After placing each move, we will have to check for the game’s end. Let’s divide the process into two steps.

- Check for the win

- Check for the tie

Once again, let’s plan the major steps of deciding the termination of the game by implementing the `gameEnds()` function. We can define the details later while defining the subordinate modules.

- Check if any player wins by probing through the updated board by calling the function `checkWin(board, currentPlayer)`. If the answer is YES (`true`) then:

   - Display the updated board (because we are not going to display it in the next iteration of the loop).

   - Display a message on the new line “Player X wins” or “Player O wins” as per current player.

   - Return `true` because the game ends here.

- Check if there is no empty cell on the updated board by calling the function `checkTie(board)`. If the answer is YES (`true`) then:

   - Display the updated board (because we are not going to display it in the next iteration of the loop).

   - Display a message on the new line “The game is a tie.”.

   - Return `true` because the game ends here.

- Return `false` (because the game did not end as per above checks).

> **Note:** We should not worry about the details of subordinate functions (`checkWin(board, currentPlayer)` and `checkTie(board)`) at this stage.

# Try it yourself
All the functions are already defined. You just have to implement the given function and execute the code.


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Termination Modules

What we have

Requirements of this module