i can not add computer in ti tac toe

Adding a computer?, It is most likely a weak AI, define the logic for the computer to follow, depending on the difficulty. A button or some other notifier should bind the Value shown on the segmented blocks to its content(eg. "X" or "O"). When a button is clicked, it should be disabled. There are usually 9 blocks so if the end user presses a button, it should be disabled and any other button that could lead to the computer beating the user should change its content to the computers Position(X/O) and be disabled. you basically define the way the game plays out based on the difficulty the user selects.

What 's your question exactly ??