This may be trivial but how do I get for a user input coords as a matrix, and to change the element to another number eg. a tic-tac-toe game player 1 inputs a coord to change a 0 in the matrix to a 1, and player 2 changes a 0 to -1. (player==0 when it is player 1's turn)
I=input('Number coordinate: '); for a=1:3 for b=1:3 if B(a,b)==0 if I==1 if player==0 B(1,1)=1; else B(1,1)=-1; end elseif I==2 if player==0 B(1,2)=1; else B(1,2)=-1; end elseif I==3 if player==0 B(1,3)=1; else B(1,3)=-1; end elseif I==4 if player==0 B(2,1)=1; else B(2,1)=-1; end elseif I==5 if player==0 B(2,2)=1; else B(2,2)=-1; end elseif I==6 if player==0 B(2,3)=1; else B(2,3)=-1; end elseif I==7 if player==0 B(3,1)=1; else B(3,1)=-1; end elseif I==8 if player==0 B(3,2)=1; else B(3,2)=-1; end elseif I==9 if player==0 B(3,3)=1; else B(3,3)=-1; end end else disp('That is an invalid move')
end end end
problems with it: It will let a user set a piece on an already used part of a matrix and will always say that it is an invalid move (even if it is valid)
Could anyone help me to find a good way to do this?
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I think you are trying to do just this:
BB = reshape(B',9,1); I=input('number coord:'); player = 1; BB(I) = 2*(player == 0) - 1; B = reshape(BB,3,3)';