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Sequential Files Print Files SORT with Input Procedure and Output Procedure Tables COBOL Program COBOL example program
$ SET SOURCEFORMAT"FREE"
IDENTIFICATION DIVISION.
PROGRAM-ID. BestSellers.
AUTHOR. MICHAEL COUGHLAN.
ENVIRONMENT DIVISION.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
SELECT BookMasterFile ASSIGN TO "BOOKMF.DAT"
ORGANIZATION IS LINE SEQUENTIAL.
SELECT BookSalesFile ASSIGN TO "BOOKSALES.DAT"
ORGANIZATION IS LINE SEQUENTIAL.
SELECT WorkFile ASSIGN TO "TEMP.DAT".
SELECT ReportFile ASSIGN TO "BSLIST.RPT"
ORGANIZATION IS LINE SEQUENTIAL.
DATA DIVISION.
FILE SECTION.
FD BookMasterFile.
01 BMF-Record.
02 BMF-BookNum PIC X(5).
02 BMF-BookTitle PIC X(25).
02 BMF-AuthorName PIC X(25).
FD BookSalesFile.
01 BSF-Record.
88 EndOfBSF VALUE HIGH-VALUES.
02 BSF-BookNum PIC X(5).
02 BSF-Copies PIC 99.
02 BSF-SaleStatus PIC X.
88 NormalSale VALUE "N".
FD ReportFile.
01 PrintLine PIC X(75).
SD WorkFile.
01 WorkRec.
88 EndOfWorkFile VALUE HIGH-VALUES.
02 W-BookNum PIC X(5).
02 W-Copies PIC 99.
02 FILLER PIC X.
WORKING-STORAGE SECTION.
01 Heading1.
02 FILLER PIC X(20) VALUE SPACES.
02 FILLER PIC X(31)
VALUE "FOLIO SOCIETY BEST SELLERS LIST".
01 Heading2.
02 FILLER PIC X(19) VALUE SPACES.
02 FILLER PIC X(33) VALUE ALL "-".
01 Heading3.
02 FILLER PIC X(7) VALUE " RANK".
02 FILLER PIC X(17) VALUE "BOOK NO.".
02 FILLER PIC X(26) VALUE "BOOK TITLE".
02 FILLER PIC X(20) VALUE "AUTHOR NAME".
02 FILLER PIC X(5) VALUE "SALES".
01 Footing-Line.
02 FILLER PIC X(25) VALUE SPACES.
02 FILLER PIC X(21) VALUE "*** END OF REPORT ***".
01 Book-Rank-Line.
02 PrnRank PIC ZZ9.
02 FILLER PIC X VALUE ".".
02 FILLER PIC X(4) VALUE SPACES.
02 PrnBookNum PIC 9(5).
02 PrnBookTitle PIC BBBX(25).
02 PrnAuthorName PIC BBX(25).
02 PrnSales PIC BBZ,ZZ9.
01 Book-Rank-TABLE.
02 BookDetails OCCURS 11 TIMES.
03 BookNum PIC 9(5).
03 BookTitle PIC X(25).
03 AuthorName PIC X(25).
03 BookSales PIC 9(4) VALUE ZEROS.
01 Rank PIC 99.
01 PrevBookNum PIC X(5).
01 BookSalesTotal PIC 9(4).
PROCEDURE DIVISION.
BEGIN.
SORT WorkFile ON ASCENDING KEY W-BookNum
INPUT PROCEDURE IS Select-NormalSales
OUTPUT PROCEDURE IS PrintBestSellersList.
STOP RUN.
Select-NormalSales.
OPEN INPUT BookSalesFile.
READ BookSalesFile
AT END SET EndOfBSF TO TRUE
END-READ
PERFORM UNTIL EndOfBSF
IF NormalSale
RELEASE WorkRec FROM BSF-Record
END-IF
READ BookSalesFile
AT END SET EndOfBSF TO TRUE
END-READ
END-PERFORM
CLOSE BookSalesFile.
PrintBestSellersList.
OPEN INPUT BookMasterFile
OPEN OUTPUT ReportFile
WRITE PrintLine FROM Heading1 AFTER ADVANCING PAGE.
WRITE PrintLine FROM Heading2 AFTER ADVANCING 1 LINE.
WRITE PrintLine FROM Heading3 AFTER ADVANCING 3 LINES.
RETURN WorkFile
AT END SET EndOfWorkfile TO TRUE
END-RETURN
PERFORM GetBookRankings UNTIL EndOfWorkfile
PERFORM PrintBookRankings
VARYING Rank FROM 1 BY 1 UNTIL Rank > 10
WRITE PrintLine FROM Footing-Line AFTER ADVANCING 3 LINES.
CLOSE ReportFile,
BookMasterFile.
PrintBookRankings.
MOVE Rank TO PrnRank
MOVE BookNum(Rank) TO PrnBookNum
MOVE BookTitle(Rank) TO PrnBookTitle
MOVE AuthorName(Rank) TO PrnAuthorName
MOVE BookSales(Rank) TO PrnSales
WRITE PrintLine FROM Book-Rank-Line
AFTER ADVANCING 2 LINES.
GetBookRankings.
MOVE W-BookNum TO PrevBookNum
MOVE ZEROS TO BookSalesTotal
PERFORM UNTIL W-BookNum NOT EQUAL TO PrevBookNum
OR EndOfWorkfile
ADD W-Copies TO BookSalesTotal
RETURN WorkFile
AT END SET EndOfWorkfile TO TRUE
END-RETURN
END-PERFORM
PERFORM WITH TEST AFTER UNTIL BMF-BookNum = PrevBookNum
READ BookMasterFile
AT END DISPLAY "IN C-B-R END-OF-BMF ENCOUNTERED"
END-READ
END-PERFORM
PERFORM CheckBookRank
VARYING Rank FROM 10 BY -1 UNTIL Rank < 1.
CheckBookRank.
IF BookSalesTotal >= BookSales(Rank)
MOVE BookDetails(Rank) TO BookDetails(Rank + 1)
MOVE BMF-BookNum TO BookNum(Rank)
MOVE BMF-BookTitle TO BookTitle(Rank)
MOVE BMF-AuthorName TO AuthorName(Rank)
MOVE BookSalesTotal TO BookSales(Rank)
END-IF.