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Is this psuedocode implementation correct? (TicTacToe)
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Hello there. I've been at this particular psuedocode set that is made for a tic-tac-toe game for quite sometime, and the MATLAB implementation indicates something wrong in this, but even with the explanation it gives, I still can't seem to figure that's wrong with it. Can anyone help out?
clc
clear
G = [0 0 0; 0 0 0; 0 0 0];
turn = 1;
rand(5)
if rand < 0.5
turn = -1;
end
gameOn = true;
plotTicTacToe(G)
while gameOn == true
if turn < 0
[r,c] = getMove(G,-1);
if r == 0 || c == 0
r = [0,G];
c = [0,G];
end
G(r,c) = -1;
turn = 1;
else
r = input('Give r');
c = input('Give c');
if G(r,c) ~= 0
continue
else
G(r,c) = 1;
turn = -1;
end
end
plotTicTacToe(G)
p = getWinner(G);
if p == 1
disp('You won!')
gameOn = false;
elseif p == -1
disp('Computer won!')
gameOn = false;
elseif p == 2
disp('Draw!')
gameOn = false;
end
end
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/169108/image.png)
Here is the rest of the code (functions) needed:
getWinner.m:
function[p1] = getWinner(p)
if p == -1
disp('Computer Wins!')
elseif p == 1
disp('You won!')
elseif p == 2
disp('Draw!')
elseif p == 0
disp('No winner yet.')
end
p1 = p;
getMove.m:
function[G, p] = getMove(r,c)
G = [0 0 0; 0 0 0; 0 0 0];
p = G;
s = 2 * p;
sumG = sum(G);
if sum(G) == s
c = find(sumG == s);
r = find(G(c) == 0);
elseif sum(G,3) == s
c = find(sumG(1,2,3) == s);
r = find(G(r,:) == 0);
elseif sum(diag(G)) == s
r = find(diagG(fliplr) == 0);
c = 4 - r;
else
r = 0;
c = 0;
end
plotTicTacToe.m:
function plotTicTacToe(G)
% plotTicTacToe(G) plot the Tic-tac-toe matrix on the command window
clc
fprintf(' \n');
fprintf(' | |\n');
fprintf(' %s | %s | %s \n', getSymb(G(1)), ...
getSymb(G(4)), ...
getSymb(G(7)));
fprintf(' ---+---+---\n');
fprintf(' %s | %s | %s \n', getSymb(G(2)), ...
getSymb(G(5)), ...
getSymb(G(8)));
fprintf(' ---+---+---\n');
fprintf(' %s | %s | %s \n', getSymb(G(3)), ...
getSymb(G(6)), ...
getSymb(G(9)));
fprintf(' | |\n');
fprintf(' \n');
end
Also getSymb.m (To get X,O,):
function[s] = getSymb(s)
disp('-1 = X, 1 = O, 0 = Empty Space');
p = input('Give me your mark: ');
if p == -1
s = 'X';
elseif p == 1
s = 'O';
elseif p == 0
s = ' ';
end
str = s;
Can anyone help out with corrections?
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