Keep getting the error "not enoguh input arguments"

Hello,

I'm trying to write a code for a tic tac toe game. I have a loop going and I am working on changing the elements of an array, given an input from the player. Th eproblem is I keep getting the errors shown in the screenshot below.

I just have no idea what I'm doing wrong, any help would be greatly appreciated, thanks!

board = [
    ["[-]", "[-]", "[-]"];
    ["[-]", "[-]", "[-]"];
    ["[-]", "[-]", "[9]"]];


inGame = true;
player = 1;


while inGame == true
    




    player_input = 3;
    %input("\nWhere would you like to input your first character?: ");

    if not(within(player_input))
        disp("Oops! Please input a number between 1-9!")
        continue
    end

    if not(free_space(player_input))
        disp("Please try a different space!")
        continue
    end

    replace(board, player_input, player)

    checkWin(board, player) %if no win is found, it should do nothing and just continue loop
end





% checks if input is within 1-9
function isWithin = within(player_input)
    if (player_input>9) || (player_input<1)
        isWithin =  false;
    else 
        isWithin = true;
    end
end


% converts player input to coordinates
function x = xCoordinate(player_input)
    x = floor(player_input/3) + 1;
end

function y = yCoordinate(player_input)
    y = mod(player_input, 3) + 1;
end



% checks if space is free
function free = free_space(board, player_input)
  x = xCoordinate(player_input);
  y = yCoordinate(player_input);
  if board(x, y) ~= "[-]"
    print("\nOops! That space is already taken!")
    free = false;
  else 
      free = true;
  end
end


% marks the selected box HAVING TROUBLE
function replace(board, player_input, player)
  if not(free_space(board, player_input))
   false %want it to return false
  else
    x = xCoordinate(player_input);
    y = yCoordinate(player_input);
    if player == -1
      board(x,y) = "[X]"
    else
      board(x, y) = "[O]"
    end
  end
end




% check win
function checkWin(board, player)
    mark = "";
    winner = "";
    if player == -1
    mark = "[X]"
    winner = "Player 1 "
    else
    mark = "[O]"
    winner = "Player 2 "
    end

    %possible wins (by rows)
    if ((board(1, 1) == mark) && (board(1,2) == mark) && (board(1, 3) == mark)) || ((board(2, 1) == mark) && (board(2,2) == mark) && (board(2,3) == mark)) || ((board(3, 1) == mark) && (board(3,2) == mark) && (board(3, 3) == mark))

        fprintf("%d wins!", winner)
        inGame = false;

    %possible wins (by columns)
    elseif (board(1, 1) == mark && board(2,1) == mark && board(3, 1) == mark) || (board(1, 2) == mark && board(2,2) == mark && board(3,2) == mark) || (board(1, 3) == mark && board(2,3) == mark && board(3, 3) == mark)

        fprintf("%d wins!", winner)
        inGame = false;

    %possible wins (by diagonals)
    elseif (board(1, 1) == mark && board(2,2) == mark && board(3, 3) == mark) || (board(3, 1) == mark && board(2,2) == mark && board(1,3) == mark)

        fprintf("%d wins!", winner)
        inGame = false;
    else
        % do nothing
    end
end

Answer 1

[the cyclist]

You call the free_space function like this:

if not(free_space(player_input))

but the free_space function takes two arguments:

% checks if space is free
function free = free_space(board, player_input)
  x = xCoordinate(player_input);
  y = yCoordinate(player_input);
  if board(x, y) ~= "[-]"
    print("\nOops! That space is already taken!")
    free = false;
  else 
      free = true;
  end
end

Looks like you need to add the first argument board.

[Rohan Thomas]

Thnak you!