CODE
# --------- Global Variables -----------
# Will hold our game board data
board = ["-", "-", "-",
"-", "-", "-",
"-", "-", "-"]
# Lets us know if the game is over yet
game_still_going = True
# Tells us who the winner is
winner = None
# Tells us who the current player is (X goes first)
current_player = "X"
# ------------- Functions ---------------
# Play a game of tic tac toe
def play_game():
# Show the initial game board
display_board()
# Loop until the game stops (winner or tie)
while game_still_going:
# Handle a turn
handle_turn(current_player)
# Check if the game is over
check_if_game_over()
# Flip to the other player
flip_player()
# Since the game is over, print the winner or tie
if winner == "X" or winner == "O":
print(winner + " won.")
elif winner == None:
print("Tie.")
# Display the game board to the screen
def display_board():
print("\n")
print(board[0] + " | " + board[1] + " | " + board[2] + " 1 | 2 | 3")
print(board[3] + " | " + board[4] + " | " + board[5] + " 4 | 5 | 6")
print(board[6] + " | " + board[7] + " | " + board[8] + " 7 | 8 | 9")
print("\n")
# Handle a turn for an arbitrary player
def handle_turn(player):
# Get position from player
print(player + "'s turn.")
position = input("Choose a position from 1-9: ")
# Whatever the user inputs, make sure it is a valid input, and the spot is open
valid = False
while not valid:
# Make sure the input is valid
while position not in ["1", "2", "3", "4", "5", "6", "7", "8", "9"]:
position = input("Choose a position from 1-9: ")
# Get correct index in our board list
position = int(position) - 1
# Then also make sure the spot is available on the board
if board[position] == "-":
valid = True
else:
print("You can't go there. Go again.")
# Put the game piece on the board
board[position] = player
# Show the game board
display_board()
# Check if the game is over
def check_if_game_over():
check_for_winner()
check_for_tie()
# Check to see if somebody has won
def check_for_winner():
# Set global variables
global winner
# Check if there was a winner anywhere
row_winner = check_rows()
column_winner = check_columns()
diagonal_winner = check_diagonals()
# Get the winner
if row_winner:
winner = row_winner
elif column_winner:
winner = column_winner
elif diagonal_winner:
winner = diagonal_winner
else:
winner = None
# Check the rows for a win
def check_rows():
# Set global variables
global game_still_going
# Check if any of the rows have all the same value (and is not empty)
row_1 = board[0] == board[1] == board[2] != "-"
row_2 = board[3] == board[4] == board[5] != "-"
row_3 = board[6] == board[7] == board[8] != "-"
# If any row does have a match, flag that there is a win
if row_1 or row_2 or row_3:
game_still_going = False
# Return the winner
if row_1:
return board[0]
elif row_2:
return board[3]
elif row_3:
return board[6]
# Or return None if there was no winner
else:
return None
# Check the columns for a win
def check_columns():
# Set global variables
global game_still_going
# Check if any of the columns have all the same value (and is not empty)
column_1 = board[0] == board[3] == board[6] != "-"
column_2 = board[1] == board[4] == board[7] != "-"
column_3 = board[2] == board[5] == board[8] != "-"
# If any row does have a match, flag that there is a win
if column_1 or column_2 or column_3:
game_still_going = False
# Return the winner
if column_1:
return board[0]
elif column_2:
return board[1]
elif column_3:
return board[2]
# Or return None if there was no winner
else:
return None
# Check the diagonals for a win
def check_diagonals():
# Set global variables
global game_still_going
# Check if any of the columns have all the same value (and is not empty)
diagonal_1 = board[0] == board[4] == board[8] != "-"
diagonal_2 = board[2] == board[4] == board[6] != "-"
# If any row does have a match, flag that there is a win
if diagonal_1 or diagonal_2:
game_still_going = False
# Return the winner
if diagonal_1:
return board[0]
elif diagonal_2:
return board[2]
# Or return None if there was no winner
else:
return None
# Check if there is a tie
def check_for_tie():
# Set global variables
global game_still_going
# If board is full
if "-" not in board:
game_still_going = False
return True
# Else there is no tie
else:
return False
# Flip the current player from X to O, or O to X
def flip_player():
# Global variables we need
global current_player
# If the current player was X, make it O
if current_player == "X":
current_player = "O"
# Or if the current player was O, make it X
elif current_player == "O":
current_player = "X"
# ------------ Start Execution -------------
# Play a game of tic tac toe
play_game()
SAVE THE FILE AS .py and run.
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