IDENTIFICATION DIVISION.
PROGRAM-ID. TIC-TAC-TOBOL.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 WS-PLAYER PIC A(1).
88 PLAYER-ONE VALUE "X".
88 PLAYER-TWO VALUE "O".
01 WS-STATE PIC A(5).
88 GAME-OVER VALUES "WIN", "LOSE", "STALE".
01 WS-MOVE-OUTCOME PIC A(5).
88 MOVE-COMPLETE VALUES "WIN", "LOSE", "FAIL".
01 WS-MASK-DETECTED PIC 9(1).
88 WIN-DETECTED VALUES 3, 4, 5, 6, 7, 8, 9.
01 WS-COMPUTER-MOVED PIC 9(1).
88 COMPUTER-MOVED VALUE 1.
01 WS-EOF PIC 9(1).
88 EOF VALUE 1.
01 WS-SWAP-PLAYERS PIC 9(1).
88 SWAP-PLAYERS VALUE 1.
01 WS-NEXT-MOVE PIC X(2).
88 FINISHED-PLAYING VALUES "N", "n".
01 WS-GAME-GRID.
05 WS-GAME-GRID-ROW OCCURS 3 TIMES.
10 WS-GAME-GRID-COL OCCURS 3 TIMES.
15 WS-CELL PIC X(1).
01 WS-WIN-MASK.
05 WS-WIN-MASK-ROW PIC X(9) OCCURS 8 TIMES.
01 WS-CURRENT-WIN-MASK PIC X(9).
01 WS-MASK-COUNT PIC 9(1).
01 WS-COL PIC 9(1).
01 WS-ROW PIC 9(1).
01 WS-WINS PIC 9(2).
01 WS-MOVES PIC 9(2).
01 WS-GAMES PIC 9(2).
01 WS-COMPUTER-MOVE PIC 9(1).
01 WS-DETECT-LOOP-COUNT PIC 9(1).
01 WS-MESSAGE PIC X(128).
01 WS-INSTRUCTION PIC X(16).
01 WS-FLAT-GAME-GRID PIC X(9).
PROCEDURE DIVISION.
MOVE "X" TO WS-PLAYER
MOVE "111000000" TO WS-WIN-MASK-ROW(1)
MOVE "000111000" TO WS-WIN-MASK-ROW(2)
MOVE "000000111" TO WS-WIN-MASK-ROW(3)
MOVE "100010001" TO WS-WIN-MASK-ROW(4)
MOVE "001010100" TO WS-WIN-MASK-ROW(5)
MOVE "100100100" TO WS-WIN-MASK-ROW(6)
MOVE "010010010" TO WS-WIN-MASK-ROW(7)
MOVE "001001001" TO WS-WIN-MASK-ROW(8)
PERFORM GAME-LOOP-PARAGRAPH
WITH TEST AFTER UNTIL FINISHED-PLAYING
STOP RUN.
GAME-LOOP-PARAGRAPH.
INITIALIZE WS-GAME-GRID
INITIALIZE WS-STATE
INITIALIZE WS-MOVES
MOVE "Make a move like 'A2'" TO WS-MESSAGE
PERFORM GAME-FRAME-PARAGRAPH
WITH TEST AFTER UNTIL GAME-OVER
ADD 1 TO WS-GAMES END-ADD
IF WS-STATE IS EQUAL TO "WIN"
ADD 1 TO WS-WINS END-ADD
DISPLAY "WINNER! (^_^)" END-DISPLAY
IF PLAYER-ONE
MOVE "PLAYER-TWO WINS (O)" TO WS-MESSAGE
ELSE
MOVE "PLAYER-ONE WINS (X)" TO WS-MESSAGE
END-IF
END-IF
DISPLAY WS-MESSAGE END-DISPLAY
DISPLAY "GAME " WS-STATE END-DISPLAY
MOVE "n" TO WS-NEXT-MOVE
.
GAME-FRAME-PARAGRAPH.
MOVE "Move to square: " TO WS-INSTRUCTION
INITIALIZE WS-MOVE-OUTCOME
INITIALIZE WS-NEXT-MOVE
DISPLAY " +---+---+---+ " END-DISPLAY
DISPLAY " A | "WS-CELL(1,1)" | "WS-CELL(1,2)" | "WS-CELL(1,3)" | " END-DISPLAY
DISPLAY " +---+---+---+ " END-DISPLAY
DISPLAY " B | "WS-CELL(2,1)" | "WS-CELL(2,2)" | "WS-CELL(2,3)" | " END-DISPLAY
DISPLAY " +---+---+---+ " END-DISPLAY
DISPLAY " C | "WS-CELL(3,1)" | "WS-CELL(3,2)" | "WS-CELL(3,3)" | " END-DISPLAY
DISPLAY " +---+---+---+ " END-DISPLAY
DISPLAY " 1 2 3 " END-DISPLAY
DISPLAY " " END-DISPLAY
DISPLAY "Stats:"
DISPLAY " > Moves played = " WS-MOVES END-DISPLAY
DISPLAY " > Games won = " WS-WINS "/" WS-GAMES END-DISPLAY
DISPLAY " "
DISPLAY "Message: " WS-MESSAGE END-DISPLAY
DISPLAY WS-INSTRUCTION
ACCEPT WS-NEXT-MOVE END-ACCEPT
DISPLAY "Accepted " WS-NEXT-MOVE " from STDIN"
DISPLAY " "
EVALUATE FUNCTION UPPER-CASE(WS-NEXT-MOVE(1:1))
WHEN "A" SET WS-ROW TO 1
WHEN "B" SET WS-ROW TO 2
WHEN "C" SET WS-ROW TO 3
WHEN OTHER MOVE "FAIL" TO WS-MOVE-OUTCOME
END-EVALUATE
SET WS-COL TO WS-NEXT-MOVE(2:1)
IF
WS-MOVE-OUTCOME IS NOT EQUAL TO "FAIL"
AND WS-COL IS GREATER THAN 0
AND WS-COL IS LESS THAN 4
AND WS-CELL(WS-ROW,WS-COL) = " "
THEN
MOVE WS-PLAYER TO WS-CELL(WS-ROW,WS-COL)
ELSE
MOVE "FAIL" TO WS-MOVE-OUTCOME
END-IF
MOVE WS-GAME-GRID TO WS-FLAT-GAME-GRID
IF PLAYER-ONE
INSPECT WS-FLAT-GAME-GRID REPLACING ALL "X" BY "1"
INSPECT WS-FLAT-GAME-GRID REPLACING ALL "O" BY "0"
ELSE
INSPECT WS-FLAT-GAME-GRID REPLACING ALL "X" BY "0"
INSPECT WS-FLAT-GAME-GRID REPLACING ALL "O" BY "1"
END-IF
INSPECT WS-FLAT-GAME-GRID REPLACING ALL " " BY "0"
INITIALIZE WS-MASK-COUNT
PERFORM 8 TIMES
ADD 1 TO WS-MASK-COUNT END-ADD
MOVE WS-WIN-MASK-ROW(WS-MASK-COUNT) TO WS-CURRENT-WIN-MASK
PERFORM VALIDATE-WIN-PARAGRAPH
END-PERFORM
IF NOT MOVE-COMPLETE AND WS-MOVES IS EQUAL TO 8
MOVE "STALE" TO WS-MOVE-OUTCOME
END-IF
INITIALIZE WS-SWAP-PLAYERS
EVALUATE WS-MOVE-OUTCOME
WHEN "WIN"
MOVE "WINNER! (^_^)" TO WS-MESSAGE
MOVE "WIN" TO WS-STATE
SET WS-SWAP-PLAYERS TO 1
WHEN "LOSE"
MOVE "YOU DIED (x_x)" TO WS-MESSAGE
MOVE "LOSE" TO WS-STATE
SET WS-SWAP-PLAYERS TO 1
WHEN "STALE"
MOVE "Stalemate! (>_<)" TO WS-MESSAGE
MOVE "STALE" TO WS-STATE
WHEN "FAIL"
MOVE "Invalid move... (o_O)" TO WS-MESSAGE
WHEN OTHER
MOVE "Enter a move" TO WS-MESSAGE
SET WS-SWAP-PLAYERS TO 1
ADD 1 TO WS-MOVES END-ADD
END-EVALUATE
IF SWAP-PLAYERS
IF PLAYER-ONE
MOVE "O" TO WS-PLAYER
ELSE
MOVE "X" TO WS-PLAYER
END-IF
END-IF
.
VALIDATE-WIN-PARAGRAPH.
INITIALIZE WS-MASK-DETECTED
SET WS-DETECT-LOOP-COUNT TO 1
PERFORM 9 TIMES
IF
WS-CURRENT-WIN-MASK(WS-DETECT-LOOP-COUNT:1)
IS EQUAL TO
WS-FLAT-GAME-GRID(WS-DETECT-LOOP-COUNT:1)
AND IS EQUAL TO 1
THEN
ADD 1 TO WS-MASK-DETECTED END-ADD
END-IF
ADD 1 TO WS-DETECT-LOOP-COUNT END-ADD
END-PERFORM
IF WIN-DETECTED
IF PLAYER-ONE
MOVE "WIN" TO WS-MOVE-OUTCOME
MOVE "PLAYER-ONE WINS (X)" TO WS-MESSAGE
ELSE
MOVE "WIN" TO WS-MOVE-OUTCOME
MOVE "PLAYER-TWO WINS (X)" TO WS-MESSAGE
END-IF
END-IF
.
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