OK I've decided to make a tic tac toe game for my fx-9750g+ using a matrix to store the positions, the only problem was that I didn't know how to use a matrix.

So far I've worked out that you can:

- Set a matrix using {x,y}->Dim Mat A.
- Use Mat A[2,3]->Z to get the value at 2 across, 3 down, stored under Z.
- Set a number on the Matrix using x->Mat A[2,3]

My code I've got so far is basically as follows:

1->B ----- B determines whether its a O or X {3,3}->Dim Mat A. ----- To set a 3x3 grid to store which squares have been taken. Using F-lines to draw the grid on the screen start loop If getkey=71 and Mat A[1,3]=0 ----- If key '1' is pressed and the according square is free: then 1->Mat A[1,3] ----- Change the matrix value to show that it is now taken B=1=>Circle (co-ordinates) ----- If it's 'O' turn then draw a circle B=2=>F-line to draw cross ----- If it's 'X' turn draw a cross 3-B->B ----- Changing the turn e.g. Making B=2 if it previously equaled 1 IfEnd ----- This is repeated for each of the keys 1->9 Endloop

I'm getting a Syntax error after the graph is drawn, so once the loop has started. I'm guessing it's to do with the matrix.

Any help would be much appreciated.