Tic Tac Toe

Tic Tac Toe (aka "Noughts and Crosses") is a simple game played between two players on a 3x3 grid.

tic tac toe completed

In this project you will implement the game rules and a terminal-based UI.

We recommend that you implement this command-line, terminal UI project before starting the Tic Tac Toe (WWW) project.

Template repository: https://github.com/BurlingtonCodeAcademy/tic-tac-toe

(image source: Public Domain)

Wireframes

After launching the program and starting the game, the terminal should display this:

 1 | 2 | 3
--- --- ---
 4 | 5 | 6
--- --- ---
 7 | 8 | 9

Player X's turn
Move to?

After the user (acting as Player X) types 2Enter, the board should redraw like this:

 1 | X | 3
--- --- ---
 4 | 5 | 6
--- --- ---
 7 | 8 | 9

Player O's turn
Move to?

Next, after the user (now acting as Player O) types 5Enter, the board should redraw like this:

 1 | X | 3
--- --- ---
 4 | O | 6
--- --- ---
 7 | 8 | 9

Player X's turn
Move to?

Stories

No Rules

Given an empty board, and

Given the current player is X

When the user selects a cell (e.g. typing 2Enter)

Then the board redraws

And an X appears in that cell

And the turn ends

And the current player changes from X to O

Given the player is O

When the user selects a cell (e.g. typing 5Enter)

Then an O appears in that cell

And the turn ends, and the current player changes from O to X

Rules

When the user selects a cell that is not empty

Then the game says "That cell is already full. "

And the board state is unchanged (it does not put an X or O in the cell)

And the current player does not change

Win Condition

Given the turn has just ended

When if there are three Xs in a row, column, or diagonal

Then the system draws a line through the winning three cells

And the app says "Congratulations! Player X wins!"

And the game ends

(and likewise for Player O)

Stalemate

Given all cells are full and neither player has three in a row

When the turn ends

Then the app says "Stalemate!"

And the game ends

Names

When starting a game, choose the names of the players (not just X and O).

When displaying the name of a player, use their name and also say which symbol they are (X or O), e.g. Alice's turn (X)

Artificial Stupidity

  • When starting a new game, choose "Player vs Player" or "Player vs Computer"
  • If "Player vs Computer" is chosen, then do not ask for a name
  • The computer player always picks an empty cell at random
  • The human is always X and the computer is always O

Artificial Intelligence (Optional)