├── .gitignore
├── LICENSE
├── README.md
├── Setup.hs
├── Tic-Tac-Toe.cabal
├── screen_shots
├── computer.png
├── draw.png
├── game.gif
└── player.png
├── src
├── Main.hs
└── TicTacToe.hs
└── stack.yaml
/.gitignore:
--------------------------------------------------------------------------------
1 | dist
2 | cabal-dev
3 | *.o
4 | *.hi
5 | *.chi
6 | *.chs.h
7 | *.dyn_o
8 | *.dyn_hi
9 | .hpc
10 | .hsenv
11 | .cabal-sandbox/
12 | cabal.sandbox.config
13 | *.prof
14 | *.aux
15 | *.hp
16 | .stack-work/
17 |
18 | .stack-work/
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
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/README.md:
--------------------------------------------------------------------------------
1 | # [Tic-Hack-Toe](https://hackage.haskell.org/package/Tic-Tac-Toe-0.1.0.2)
2 |
3 | 
4 |
5 | Bored, tired, or just need a break? Play a quick game of tic tac toe against your computer in the command line!
6 |
7 | Programmed in Haskell with :heart: at Hack the North 2015.
8 |
9 | # Usage
10 |
11 | $ cabal update
12 | $ cabal install Tic-Tac-Toe
13 | $ Tic-Tac-Toe
14 |
15 | # Name
16 |
17 | Tic-Hack-Toe. Get it? Because the Tic-Tac-To game was made at a hackathon and also because it was made in Haskell :sunglasses:.
18 |
19 |
20 | # TODO
21 |
22 | I would love any contributions! Feel free to open up an issue or a PR if you think you can help. The code is pretty simple, so its even pretty beginner friendly.
23 |
24 | - Add tests
25 | - Fix AI to not just choose the first possible move if it doesn't have a move it needs to make
26 | - Apparently X goes first, not O, so fix that
27 | - Look into colored output for the X's and the O's for a better UI
28 |
--------------------------------------------------------------------------------
/Setup.hs:
--------------------------------------------------------------------------------
1 | import Distribution.Simple
2 | main = defaultMain
3 |
--------------------------------------------------------------------------------
/Tic-Tac-Toe.cabal:
--------------------------------------------------------------------------------
1 | -- Initial TicTacToe.cabal generated by cabal init. For further
2 | -- documentation, see http://haskell.org/cabal/users-guide/
3 |
4 | name: Tic-Tac-Toe
5 | version: 0.1.0.2
6 | synopsis: Tic Tac Toe in your command line!
7 | description: Bored, tired, or just need a break? Play a quick game of tic tac toe against your computer in the command line!
8 | homepage: https://github.com/2016rshah/Tic-Hack-Toe
9 | license: Apache-2.0
10 | license-file: LICENSE
11 | author: Rushi Shah
12 |
13 | maintainer: 2016rshah@gmail.com
14 |
15 | -- copyright:
16 | category: Game
17 | build-type: Simple
18 | -- extra-source-files:
19 | cabal-version: >=1.10
20 |
21 | executable Tic-Tac-Toe
22 | main-is: Main.hs
23 | -- Modules exported by the library.
24 | -- exposed-modules:
25 |
26 | -- Modules included in this library but not exported.
27 | other-modules: TicTacToe
28 |
29 | build-depends: base >= 2 && < 5
30 | , safe -any
31 | hs-source-dirs: src
32 | default-language: Haskell2010
33 |
34 | source-repository head
35 | type: git
36 | location: https://github.com/2016rshah/Tic-Hack-Toe.git
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/screen_shots/computer.png:
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/screen_shots/draw.png:
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/screen_shots/game.gif:
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https://raw.githubusercontent.com/2016rshah/Tic-Hack-Toe/e96fa9869f2a15c8cde30c9606ef52d24a27508d/screen_shots/game.gif
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/screen_shots/player.png:
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https://raw.githubusercontent.com/2016rshah/Tic-Hack-Toe/e96fa9869f2a15c8cde30c9606ef52d24a27508d/screen_shots/player.png
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/src/Main.hs:
--------------------------------------------------------------------------------
1 | module Main where
2 |
3 | import TicTacToe
4 | import System.IO
5 |
6 | -- |Greet user, start recursion, and say farewell to user when game ends
7 | main :: IO ()
8 | main = do
9 | putStrLn "Welcome to tic tac toe."
10 |
11 | --start recursion
12 | playerMove emptyBoard
13 |
14 | putStrLn "Thanks for playing!"
15 |
16 | -- |Helper function to ensure prompt is made before user is expected to input something
17 | promptLine :: String -> IO String
18 | promptLine text = do
19 | putStr text
20 | hFlush stdout
21 | getLine
22 |
23 | -- |Code common to both player and computer at the end of the game
24 | endRecursion :: Board -> IO ()
25 | endRecursion b = do
26 | putStrLn (show b)
27 | putStrLn (winner b) -- end recursion
28 |
29 | -- |Grab the user's move, and feed that to tic-tac-toe. Recurse as needed.
30 | playerMove :: Board -> IO ()
31 | playerMove board = do
32 | putStrLn (show board)
33 | loc <- promptLine "Where do you want to place your X? "
34 | putStrLn ""
35 | let moveLoc = Left (read loc)
36 | let newBoard = findAndReplace board moveLoc (Right X)
37 | if won newBoard || draw newBoard
38 | then endRecursion newBoard
39 | else compMove newBoard -- continue recursion
40 |
41 | -- |Make a decision based on the board on where to move. Recurse as needed.
42 | compMove :: Board -> IO ()
43 | compMove board = do
44 | let newBoard = makeOMove board
45 | if won newBoard || draw newBoard
46 | then endRecursion newBoard -- end recursion
47 | else playerMove newBoard -- continue recursion
48 |
--------------------------------------------------------------------------------
/src/TicTacToe.hs:
--------------------------------------------------------------------------------
1 | module TicTacToe where
2 |
3 | {-# LANGUAGE FlexibleInstances #-}
4 |
5 |
6 | import Data.Either
7 | import Safe
8 | import Data.Maybe
9 | import Data.List
10 |
11 | -- |Slots in the board can either be filled with Naughts or Crosses
12 | data Symbol = X | O
13 | deriving (Show, Eq)
14 |
15 | -- |Empty slots are referred to by their location on the board
16 | type Piece = Either Int Symbol
17 |
18 | -- |A set of three pieces is used to represent rows, columns, and diagonals
19 | type Three = [Piece] -- how do I constrain this to a length of three?
20 |
21 | -- |The game board is made up of three rows of three pieces each.
22 | data Board = Board Three Three Three
23 | deriving (Eq)
24 |
25 | --Thank you to http://projects.haskell.org/operational/examples/TicTacToe.hs.html for the show function
26 | instance Show Board where
27 | show board =
28 | unlines . surround "+---+---+---+"
29 | . map (concat . surround "|". map showSquare)
30 | $ (rows board)
31 | where
32 | surround x xs = [x] ++ intersperse x xs ++ [x]
33 | showSquare = either (\n -> " " ++ show n ++ " ") (\n -> color n)
34 |
35 | -- | \ESC[ for ANSI escape
36 | esc :: Int -> String
37 | esc i = concat ["\ESC[", show i, "m"]
38 |
39 | -- | Black=30, Red=31, Green=32, Yellow=33, Blue=34, Magenta=35, Cyan=36, White=37
40 | color :: Symbol -> String
41 | color s
42 | | s == X = esc 32++" "++show s++" "++esc 0
43 | | otherwise = esc 31++" "++show s++" "++esc 0
44 |
45 | -- |Convenience function for constructing an empty board
46 | emptyBoard :: Board
47 | emptyBoard = Board [Left 1, Left 2, Left 3] [Left 4, Left 5, Left 6] [Left 7, Left 8, Left 9]
48 |
49 | -- |Given either a row, column, or diagonal, it checks whether it is entirely filled with naughts or crosses
50 | full :: Three -> Bool
51 | full ts@[a,b,c] = noLefts && allEqual
52 | where
53 | noLefts = foldl (\acc curr -> acc && (isRight curr)) True ts
54 | allEqual = a == b && b == c
55 |
56 | -- |Given a game board, check whether the game is over because someone won
57 | won :: Board -> Bool
58 | won b = foldl (\acc curr -> acc || (full curr)) False ((rows b) ++ (cols b) ++ (diags b))
59 |
60 | -- |Given a game board, check whether the game is over due to a draw
61 | draw :: Board -> Bool
62 | draw b = length (possibleMoves b) == 0
63 |
64 | -- |Message to display to the user about the results of the game
65 | winner :: Board -> String
66 | winner b = if length winnerType > 0 then head winnerType else "It was a draw!"
67 | where
68 | allConfigs = ((rows b) ++ (cols b) ++ (diags b))
69 | winnerType = [if a == (Right O) then "The computer wins!" else "You win!" | curr@[a,b,c] <- allConfigs, full curr]
70 |
71 | -- |Extract rows from game board
72 | rows :: Board -> [Three]
73 | rows (Board x y z) = [x, y, z]
74 |
75 | -- |Extract columns from game board
76 | cols :: Board -> [Three]
77 | cols (Board [a, b, c] [d, e, f] [g, h, i]) = [[a, d, g], [b, e, h], [c, f, i]]
78 |
79 | -- |Extract diagonals from game board
80 | diags :: Board -> [Three]
81 | diags (Board [a, _, c] [_, e, _] [g, _, i]) = [[a, e, i], [c, e, g]]
82 |
83 | -- |List of places where a piece can be placed
84 | possibleMoves :: Board -> [Piece]
85 | possibleMoves board = filter isLeft (boardToList board)
86 |
87 | -- |Helper function to convert a board into a list of values
88 | boardToList :: Board -> [Piece]
89 | boardToList (Board x y z) = x ++ y ++ z
90 |
91 | -- |Helper function to convert a list of values into a board
92 | listToBoard :: [Piece] -> Board
93 | listToBoard [a,b,c,d,e,f,g,h,i] = Board [a,b,c] [d,e,f] [g,h,i]
94 |
95 | -- |Function to update the game board with a new value at a specified point
96 | findAndReplace :: Board -> Piece -> Piece -> Board
97 | findAndReplace b p1 p2 = listToBoard [if x==p1 then p2 else x | x <- bl]
98 | where bl = boardToList b
99 |
100 | -- |Check if O's can immediately win, and if so, do it
101 | winningOMove :: Board -> Maybe Board
102 | winningOMove b = headMay [findAndReplace b p (Right O) | p <- (possibleMoves b), won (findAndReplace b p (Right O))]
103 |
104 | -- |Check if X's can immediately win, and if so, block it
105 | blockXWin :: Board -> Maybe Board
106 | blockXWin b = headMay [findAndReplace b p (Right O) | p <- (possibleMoves b), won (findAndReplace b p (Right X))]
107 |
108 | -- |Check whether a board has been forked
109 | isFork :: Board -> Bool
110 | isFork b = 2 == length [findAndReplace b p (Right O) | p <- (possibleMoves b), won (findAndReplace b p (Right O))]
111 |
112 | -- |Check if O's can make a fork, and if so, do it
113 | forkO :: Board -> Maybe Board
114 | forkO b = headMay [findAndReplace b p (Right O) | p <- (possibleMoves b), isFork (findAndReplace b p (Right O))]
115 |
116 | -- |Check if X's can make a fork, and if so, block it
117 | blockXFork :: Board -> Maybe Board
118 | blockXFork b = headMay [findAndReplace b p (Right O) | p <- (possibleMoves b), isFork (findAndReplace b p (Right X))]
119 |
120 | -- |Decision tree for AI that will go down the list to make its move
121 | makeOMove :: Board -> Board
122 | makeOMove board@(Board x@[a, b, c] y@[d, e, f] z@[g, h, i])
123 | | isJust (winningOMove board) = fromJust (winningOMove board)
124 | | isJust (blockXWin board) = fromJust (blockXWin board)
125 | | isJust (forkO board) = fromJust (forkO board)
126 | | isJust (blockXFork board) = fromJust (blockXFork board)
127 | | elem e (possibleMoves board) = findAndReplace board e (Right O)
128 | | otherwise = if length (possibleMoves board) > 0
129 | then findAndReplace board (head (possibleMoves board)) (Right O)
130 | else board --This should not happen
131 |
--------------------------------------------------------------------------------
/stack.yaml:
--------------------------------------------------------------------------------
1 | # This file was automatically generated by 'stack init'
2 | #
3 | # Some commonly used options have been documented as comments in this file.
4 | # For advanced use and comprehensive documentation of the format, please see:
5 | # http://docs.haskellstack.org/en/stable/yaml_configuration/
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13 | # resolver: ghc-7.10.2
14 | # resolver: ghcjs-0.1.0_ghc-7.10.2
15 | # resolver:
16 | # name: custom-snapshot
17 | # location: "./custom-snapshot.yaml"
18 | resolver: lts-7.2
19 |
20 | # User packages to be built.
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22 | #
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29 | # - location: https://github.com/commercialhaskell/stack/commit/e7b331f14bcffb8367cd58fbfc8b40ec7642100a
30 | # extra-dep: true
31 | # subdirs:
32 | # - auto-update
33 | # - wai
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36 | # non-dependency (i.e. a user package), and its test suites and benchmarks
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39 | - '.'
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43 |
44 | # Override default flag values for local packages and extra-deps
45 | flags: {}
46 |
47 | # Extra package databases containing global packages
48 | extra-package-dbs: []
49 |
50 | # Control whether we use the GHC we find on the path
51 | # system-ghc: true
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53 | # Require a specific version of stack, using version ranges
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61 | # Extra directories used by stack for building
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65 | # Allow a newer minor version of GHC than the snapshot specifies
66 | # compiler-check: newer-minor
--------------------------------------------------------------------------------