Game $3$: Tic Tac Toe

Objective:

Create a two$-$player game where players take turns marking spaces on a $3$x$3$ grid.

Steps:

$1.$ Setup:

o Display a welcome message and instructions.

o Initialize a $3$x$3$ matrix $($board$)$ to represent the game grid:

$0=$ empty, $1=$ Player $1($X$),2=$ Player $2($O$).$

$2.$ Game Logic:

o Use a loop that passes through while the turn count is less than $9$ and there is no

winner.

o Display the current board using the disp function

o Use fprintf to display what player$$s turn it is$.$ Prompt the current player for a row and

column to mark their move using the input function. Row $1-3$ and Column $1-3.$

o Validate the move to ensure the chosen cell is empty $(=0)$ and the input is between

within the allowable row and column range. If the move is invalid, prompt the user to

enter a new move.

o Update the board with the player$$s move. The cell should be filled with a $1$ or $2$ that

denotes that players move.

o Change the player using conditional statements.

o Check if there is a winner after each move with the function checkWinner and a

conditional statement.

$3.$ Functions:

o Create a function called $$checkWinner$$ that outputs if a win has occurred and has

the inputs of the board and current player. Check for a win after each move:

$$ A win occurs if any row, column, or diagonal has the same value $($all $1$s or all

$2$s$).$ Use a combination of logical operators and any$/$all functions. The diag

function will read along the diagonal of a matrix. Use diag$($flipud$())$ to check

along the other diagonal of the matrix.

o Declare a draw if all cells are filled and no winner is found.

$4.$ Results:

o Display the final board once there is a winner.

o Use a conditional statement to announce the winner or declare a draw at the end. If

there is a winner, use fprintf to display the winning player.