Clear Filters
Clear Filters

Terminating a game of tic tac toe if two entries are entered in the same cell

3 views (last 30 days)
As the title suggests, i am finishing up making a game of tic tac toe , and want to write some code at the end that will terminae/end the game if the players try and put more than one X or o in each space. This is what I have currently .
TTCboard = zeros(3,3);
% for creating the standard tic-tac-toe board in green
figure
plot([0 3],[-1 -1], 'g','linewidth',1);% creates top horizontal line in board
hold on
plot([2 2],[0 -3], 'g','linewidth',1)% creates right-most vertical line
plot([0 3],[-2 -2], 'g','linewidth',1)% creates bottom horizontal line
plot([1 1],[0 -3], 'g','linewidth',1)% creates left-most vertical line
axis off % keeps the X & y-axis off, creating a better looking natural board
hold off% ensures later commands are added to existing board
xticks([0 1 2 3]); yticks([0 1 2 3]);
xticklabels([]); yticklabels([]);
player = 'X' % designates the first player as X
while true % when it is player x's turn,
fprintf('%s click to place a piece\n', player); % creates X in the cell clicked on
[x, y] = ginput(1);
x = floor(x)+0.43 ;
y = floor(y)+0.5;
text(x,y,player, 'horizontalalignment', 'center', "FontSize",24);% gives specific parameters to the X on the board
xticks([0 1 2 3]); yticks([0 1 2 3]);
xticklabels([]); yticklabels([]);
player2 = 'O' % Designates the 2nd players turn
while true
fprintf('%s click to place a piece\n', player2);
[x, y] = ginput(1);
x = floor(x)+0.43 ;
y = floor(y)+0.5;
text(x,y,player2, 'horizontalalignment', 'center', "FontSize",24);
break;
end
end
  1 Comment
John Chilleri
John Chilleri on 15 Mar 2021
One possibility is to create an additional 3x3 matrix of zeros, and whenever an X or O is added, change the corresponding entry to 1. Then implement a simple check before placing Xs and Os that ensures the matrix entry is 0 (meaning available).

Sign in to comment.

Accepted Answer

Bob Thompson
Bob Thompson on 15 Mar 2021
John has a pretty good idea with that.
If you put in a logic check and a loop, you don't even need to actually quit the game, just tell the player to pick an open spot.
Sample below, but beware that I have not tested it yet. Also, note that P1 has squares marked as 1, and P2 has squares marked as 2. I imagine that will be useful for determining who owns which squares and if somebody wins.
while true % when it is player x's turn,
fprintf('%s click to place a piece\n', player); % creates X in the cell clicked on
[x, y] = ginput(1);
x = floor(x)+0.5 ;
y = floor(y)+0.5;
while TTCboard(x+0.5,-(y-0.5)) ~= 0;
disp('Please pick an open square')
[x, y] = ginput(1);
x = floor(x)+0.5;
y = floor(y)+0.5;
end
text(x,y,player, 'horizontalalignment', 'center', 'FontSize',24);% gives specific parameters to the X on the board
% Close space for later use
TTCboard(x+0.5,-(y-0.5)) = 1;
xticks([0 1 2 3]); yticks([0 1 2 3]);
xticklabels([]); yticklabels([]);
player2 = 'O' % Designates the 2nd players turn
while true
fprintf('%s click to place a piece\n', player2);
[x, y] = ginput(1);
x = floor(x)+0.5;
y = floor(y)+0.5;
while TTCboard(x+0.5,-(y-0.5)) ~= 0;
disp('Please pick an open square')
[x, y] = ginput(1);
x = floor(x)+0.5;
y = floor(y)+0.5;
end
text(x,y,player2, 'horizontalalignment', 'center', 'FontSize',24);
% Close space for later use
TTCboard(x+0.5,-(y-0.5)) = 2;
break;
end
end
  3 Comments
Bob Thompson
Bob Thompson on 15 Mar 2021
Edited: Bob Thompson on 15 Mar 2021
Really? I took exactly what I put down and didn't have any issues with it. Did you make other adjustments to it? I don't think I changed anything outside of what I posted.
Nathan Ross
Nathan Ross on 15 Mar 2021
I looked a little closer and noticed I had a small error, it works as it should now. That pretty much sums up the project . Thank you for all the help.

Sign in to comment.

More Answers (0)

Categories

Find more on Graphics Object Programming in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!