In a local writable folder, create the function mtictac.m. The input is a Tic-Tac-Toe game board. The output is the winning player. The output is 0 if there is no winner.

function a = mtictac(b)
% Input is a Tic-Tac-Toe board.
% The output is the winning player 
% or zero if none.

%   Copyright 2022 The MathWorks, Inc.

for i = 1:3
    a = winner(b(i,:));
    if a > 0
        return;
    end
    a = winner(b(:,i));
    if a > 0
        return;
    end
end

a = winner(diag(b));
if a>0
    return;
end

a = winner(diag(flip(b)));

In the same folder, create the function, winner.m. The winner.m function is called by the function mtictac.m.

function a = winner(b)

%   Copyright 2022 The MathWorks, Inc.

x = mean(b);

if x <= - 1
    a = 1;
elseif x >= 1
    a = 2;
else
    a = 0;
end

In the same folder, create a test file, mtictac_tb.m, that calls the mtictac function.

mtictac([-1 0 0; 0 -1 0; 0 0 0]);
mtictac([1 0 0; 0 1 0; 0 0 1]);
mtictac([0 0 -1; 0 0 -1; 0 0 -1]);

From the apps gallery, open the Fixed-Point Converter app.

Select mtictac.m as your entry-point function.

Click Next. On the Define Input Types page, enter the test file that exercises the mtictac.m function. Browse to select the mtictac_tb.m file. Click Autodefine Input Types.

Click Next. The app generates an instrumented MEX function for your entry-point MATLAB function.

Click Analyze. Observe that two instances have different data types. The data types for each individual call of the winner function can be customized to use different data types.

Click Convert.

The Fixed-Point Converter app converts the function containing the structures to fixed point and generates the mtictac_fixpt.m file.