Answer
code
Work Step by Step
# 11.9 (Game: play a tic-tac-toe game) In a game of tic-tac-toe, two players take turns
# marking an available cell in a 3*3 grid with their respective tokens (either X or
# O). When one player has placed three tokens in a horizontal, vertical, or diagonal
# row on the grid, the game is over and that player has won. A draw (no winner)
# occurs when all the cells in the grid have been filled with tokens and neither player
# has achieved a win. Create a program for playing tic-tac-toe.
# The program prompts two players to alternately enter an X token and an O
# token. Whenever a token is entered, the program redisplays the board on the
# console and determines the status of the game (win, draw, or continue).
def draw_board(p1, p2):
print("---------------")
for row in range(len(p1)):
for col in range(len(p1[0])):
if p1[row][col] == 1:
print("| X", end=' |')
elif p2[row][col] == 1:
print("| O", end=' |')
else:
print(" ", end=' ')
print("\n---------------")
def is_won(p):
# check row
for row in p:
if row[0] == 1 and row[1] == 1 and row[2] == 1:
return True
# check column
p_transpose = [[row[i] for row in p] for i in range(len(p[0]))]
for row in p_transpose:
if row[0] == 1 and row[1] == 1 and row[2] == 1:
return True
# check diagonals
if (p[0][0] == 1 and p[1][1] == 1 and p[2][2] == 1) or \
(p[0][2] == 1 and p[1][1] == 1 and p[2][0] == 1):
return True
return False
def is_correct_move(p1, p2, x, y):
if p1[x][y] == 0 and p2[x][y] == 0 and 0 <= x <= 2 and 0 <= y <= 2:
return True
else:
return False
def is_a_draw(board):
for row in board:
for col in row:
if col == 0:
return False
return True
playAgain = 'y'
while playAgain.lower() == 'y': # you can make it one board(list) for both players, player x is 1 and player o is 2.
p1 = [[0, 0, 0], # X
[0, 0, 0],
[0, 0, 0]]
p2 = [[0, 0, 0], # O
[0, 0, 0],
[0, 0, 0]]
board = [[0, 0, 0], # used to detect a draw
[0, 0, 0],
[0, 0, 0]]
draw_board(p1, p2)
turn = 'x'
while not is_won(p1) and not is_won(p2) and not is_a_draw(board):
if turn == 'x':
x = int(input("Enter a row (0, 1, or 2) for player X: "))
y = int(input("Enter a column (0, 1, or 2) for player X: "))
while not is_correct_move(p1, p2, x, y):
print("Please enter a valid row and column values")
x = int(input("Enter a row (0, 1, or 2) for player X: "))
y = int(input("Enter a column (0, 1, or 2) for player X: "))
p1[x][y] = 1
board[x][y] = 1
draw_board(p1, p2)
if is_won(p1):
print("Player X is won")
break
turn = 'o'
elif turn == 'o':
x = int(input("Enter a row (0, 1, or 2) for player O: "))
y = int(input("Enter a column (0, 1, or 2) for player O: "))
while not is_correct_move(p1, p2, x, y):
print("Please enter a valid row and column values")
x = int(input("Enter a row (0, 1, or 2) for player X: "))
y = int(input("Enter a column (0, 1, or 2) for player X: "))
p2[x][y] = 1
board[x][y] = 1
draw_board(p1, p2)
if is_won(p2):
print("Player O is won")
break
turn = 'x'
if is_a_draw(board):
print("Draw")
playAgain = input("Do you want to play again? y or n ")
