Topics: User Defined Functions and MATLAB Conditionals A Childrens game studio n

Question

Topics: User Defined Functions and MATLAB Conditionals

A Childrens game studio needs you to write a MATLAB Program to allow two players to play the game Tic-Tac-Toe on a computer:

This is a two player (X's and O's) board game.

The game board is a 3 X 3 grid, where each location can hold either an 'X' an 'O' or a space (empty) Note: we will linearize the grid and refer to the its locations as 1 - 9, for conveyance.

The players take turns placing their mark into one of the (empty) locations in the grid.

The game is won when a player has their mark in all three locations of any row, column, or diagonal.

The game can also reach a stalemate: neither player has won (by above criteria) however all there are no more empty locations in the grid.

Outline:

Create a MATLAB Script .m file

Establish variable(s) to represent the nine board locations

Create the game loop

i.Display the current state of the board – using separate displayBoard function

ii.Get a “valid” move location – note this can only be an empty location [1, 9]

iii.Modify the board variable(s)

iv.Check for a win and report it if so – game must end

v.Check for a stalemate – game must end

Create a MATLAB Function .m file

Establish its name (displayBoard), input(s) , and output (there really is not any)

Write the necessary MATLAB commands to display the Tic-Tac-Toe board, using the given input(s)

Make sure to test your script and function when they are done

Notes(s):

Keep track of the total number of moves, for an easy stalemate detection.

Your location choice user-validation loop must also not accept any location that is not currently empty.

At times things will feel very tedious - doing the "same" thing nine times ...

Sample Run(s):

Welcome to Tic-Tac-Toe : X goes first

-------------------------------------

    |     |   

---------------

    |     |   

---------------

    |     |   

Please enter location to move [1 - 9] : 10

Please enter location to move [1 - 9] : -1

Please enter location to move [1 - 9] : 1

X |     |   

---------------

    |     |   

---------------

    |     |   

Please enter location to move [1 - 9] : 1

Please enter location to move [1 - 9] : 2

X | O |   

---------------

    |     |   

---------------

    |     |   

Please enter location to move [1 - 9] : 3

X | O | X

---------------

    |     |   

---------------

    |     |   

Please enter location to move [1 - 9] : 4

X | O | X

---------------

O |     |   

---------------

    |     |   

Please enter location to move [1 - 9] : 5

X | O | X

---------------

O | X |   

---------------

    |     |   

Please enter location to move [1 - 9] : 6

X | O | X

---------------

O | X | O

---------------

    |     |   

Please enter location to move [1 - 9] : 7

X | O | X

---------------

O | X | O

---------------

X |     |   

Congrats - X Wins!

Explanation / Answer

Here is the code with comments. Please do rate the answer if it helped Thanks.

board=[ [' ' ' ' ' '],
[' ' ' ' ' '],
[' ' ' ' ' ']]; %intital state of board
turn = 1 ; %x's turn to play
moves = 0 ;% no of moves, total will be 9
winner=-1
player='X'
while moves < 9
  
   moves=moves + 1 ;  
  
   make_move(board,turn);
     
turn=next_move(board,turn);
  
   if turn == -1 %already some winner
   break
   end
end

if (winner==1)
   disp('Player X wins')
elseif (winner==0)
   disp ('Player O wins')
else
   disp ('Its a draw')
end

function disp_board(board)
   for i=1:1:3
   fprintf(' %c | %c | %c ',board(i,1),board(i,2),board(i,3) );
   fprintf(" ------------------- ");
   end
end

function make_move(board,turn)

   rep=true;
  
   while rep
     
   if turn==1
   msg= "Player X: Enter a move 1-9";
   player='X';
   else
   msg="Player O: Enter a move 1-9";
   player='O';
   end
  
   num=input(msg);
  
   %check if the location entered is not occupied yet
  
   if (num== 1 && board(1,1)==' ' )
   board(1,1)=player;
   rep=false;
   elseif (num==2 && board(1,2)==' ')
   board(1,2)=player;
   rep=false;
   elseif (num==3 && board(1,3)==' ')
   board(1,3)=player;
   rep=false;
   elseif (num==4 && board(2,1)==' ')
   board(2,1)=player;
   rep=false;
   elseif(num== 5 && board(2,2)==' ')
   board(2,2)=player;
   rep=false;
   elseif (num==6 && board(2,3)==' ')
   board(2,3)=player;
   rep=false;
   elseif (num== 7 && board(3,1)==' ')
   board(3,1)=player;
   rep=false;
   elseif (num==8 && board(3,2)==' ')
   board(3,2)=player;
   rep=false;
   elseif (num==9 && board(3,3)==' ')
   board(3,3)=player;
   rep=false;
   else
   rep=true;
   end
   if(rep==false)
   break
   end
   end
  
  
end

%function to calculate if the player in turn is winner or if not winner , change to next player's turn

function turn=next_move(board,turn)
   if((board(1,1)==player && board(1,2)==player && board(1,3)==player) || %top horizontal
(board(2,1)==player && board(2,2)==player && board(2,3)==player) || %center horizontal
(board(3,1)==player && board(3,2)==player && board(3,3)==player) || %bottom horizontal
(board(1,1)==player && board(2,1)==player && board(3,1)==player) || %left vertical
(board(1,2)==player && board(2,2)==player && board(3,2)==player) || %center vertical
(board(1,3)==player && board(2,3)==player && board(3,3)==player) || %right vertical
(board(1,1)==player && board(2,2)==player && board(3,3)==player) || %diagonal from 1,1
(board(1,3)==player && board(2,2)==player && board(3,1)==player) ) %diagonal from 1,3
   winner=turn;
   turn=-1;
   else
   turn=1-turn;
   end
end

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