14/19 question


#1

So I have made a code that’s running, and gotten all the green checks but there’s still an issue. When I guess for example row 3 and col 2, the “X” appears on row 4 and col 3. I guess there is a - 1 missing somewhere in my code but I can’t locate it. This is my code:

from random import randint

board = []

for x in range(0, 5):
board.append([“O”] * 5)

def print_board(board):
for row in board:
print " ".join(row)

print_board(board)

def random_row(board):
return randint(0, len(board) - 1)

def random_col(board):
return randint(0, len(board) - 1)

ship_row = random_row(board)
ship_col = random_col(board)
guess_row = int(raw_input("Guess Row: "))
guess_col = int(raw_input("Guess Col: "))

Write your code below!

if guess_row == ship_row and guess_col == ship_col:
print “Congratulations! You sank my battleship!”
else:
if guess_row not in range(5) or guess_col not in range(5):
print “Oops, that’s not even in the ocean.”
elif guess_row == “X” or guess_col == “X”:
print “You guessed that one already.”
else:
print “You missed my battleship!”
board[guess_row][guess_col] = “X”
print_board(board)

Where did I make the mistake?


#2

well, lists are zero indexed based. So if you want to compensate for human behaviour (starting at 1), you should subtract one from the user input


#3

ah great, putting -1 after the guess_row and guess_col worked, thanks!


#4

Then its of course easier to manipulate the user input, manipulating the list which are built into the python programming language would be a challenge.


#5

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