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
Here is the snap of the `gameEnds()` function, which calls the `checkWin()` function.

bool gameEnds(char board[], char currentPlayer) {
    if (checkWin(board, currentPlayer)) {
        displayBoard(board);
        cout << "\nPlayer " << currentPlayer << " wins!\n";
        return true;
    }
    if (checkTie(board)) {
        displayBoard(board);
        cout << "\nThe game is a tie.\n";
        return true;
    }

    return false;
}

# Requirements of this module
We have to check if a player wins. We can create a `bool` function `checkWin()`, which will take two arguments, `board` and `player`, to check whether that player wins. There are $8$ winning patterns on a $3$x$3$ grid, six in lines and two in diagonals.

We can also create separate functions that check for all the horizontal, vertical, and diagonal winning patterns separately on a board. These are two functions to check winning patterns:

- `checkWinDiagonal`: To check winning patterns in diagonals.

- `checkWinLine`: To check winning patterns in horizontal and vertical lines. We can further break it down to separately test for horizontal and vertical lines.

We’ll use the `if-else` statement to check all those patterns and add it after every player move to check whether the player has won.

The function `checkWin()` performs the following tasks:
- Receive two parameters: `board` and `player`.
- Call its subordinate functions to check the win for the `player`.
- Return `true` if any of the subordinates return `true`.

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



# Try it yourself

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



Learn how can we check which player wins.

__default

Win Modules

What we have

Requirements of this module