我有三个VSAM文件。一个用于客户，视频和租赁。在这些VSAM文件中，每个客户，视频和租赁都有一个id。以下是客户文件的示例：
300，Bob，315-123-1414
301，Ryan，315-213-2617
302，Smith，315-123-1234
303，Roberta，212-125-1234
视频文件和租借文件的设置方式相同。
我需要做的是编写一个cobol程序，它将读取这些VSAM文件，然后列出客户，视频以及客户租用的视频。我计划通过为每个客户提供一个ID号码，然后将该ID号码与租借的视频放在一起。
我到目前为止的cobol代码如下：
ID DIVISION.
PROGRAM-ID. PROG3
ENVIRONMENT DIVISION.
CONFIGURATION SECTION.
SOURCE-COMPUTER. IBM-Z10.
OBJECT-COMPUTER. IBM-Z10.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
SELECT CUR-FILE ASSIGN TO MYFILE1
ORGANIZATION INDEXED ACCESS IS SEQUENTIAL
RECORD KEY IS EMP-NO FILE STATUS IS F13.
DATA DIVISION.
FILE SECTION.
FD CUR-FILE
RECORD CONTAINS 80 CHARACTERS
DATA RECORD IS CUR-REC.
01 CUR-REC.
02 EMP-NO PIC X(6).
02 EMP-NAME PIC X(24).
02 EMP-ADDRESS PIC X(50).
WORKING-STORAGE SECTION.
77 F13 PIC 99 VALUE ZEROS.
PROCEDURE DIVISION.
0001-MAIN.
DISPLAY ' I M IN MAIN '.
DISPLAY ' I M IN MAIN '.
OPEN OUTPUT CUR-FILE. IF F13 = 00
DISPLAY ' I M OPENED SUCCESSFULLY ' ELSE
DISPLAY 'OPEN-ERROR ' F13 STOP RUN.
MOVE '822655' TO EMP-NO.
DISPLAY EMP-NO.
MOVE 'MUSADDIQ USMAN' TO EMP-NAME.
MOVE 'P-5/01 STEEL TOWN' TO EMP-ADDRESS.
DISPLAY CUR-REC.
WRITE CUR-REC.
IF F13 = 00 DISPLAY 'WRITE SUCCESSFUL' ELSE
DISPLAY 'WRITE ERROR ' F13 STOP RUN.
CLOSE CUR-FILE.
STOP RUN.
下面我正在添加阅读程序，我想这有助于你帮助我：
ID DIVISION.
PROGRAM-ID. RDVSAM.
ENVIRONMENT DIVISION.
CONFIGURATION SECTION.
SOURCE-COMPUTER. IBM-Z10.
OBJECT-COMPUTER. IBM-Z10.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
SELECT CUR-FILE ASSIGN TO MYFILE1
ORGANIZATION INDEXED ACCESS IS SEQUENTIAL
RECORD KEY IS EMP-NO FILE STATUS IS F13.
DATA DIVISION.
FILE SECTION.
FD CUR-FILE
RECORD CONTAINS 80 CHARACTERS
DATA RECORD IS CUR-REC.
01 CUR-REC.
02 EMP-NO PIC 9(6).
02 EMP-NAME PIC X(24).
02 EMP-ADDRESS PIC X(50).
WORKING-STORAGE SECTION.
77 F13 PIC 99 VALUE ZEROS.
PROCEDURE DIVISION.
0001-MAIN.
OPEN INPUT CUR-FILE. IF F13 = 00
DISPLAY ' I M OPENED SUCCESSFULLY ' ELSE
DISPLAY 'OPEN-ERROR ' F13 STOP RUN.
REAd-FILE.
READ CUR-FILE AT END GO TO CLOSE-UP.
DISPLAY EMP-NO ' ' EMP-NAME ' ' EMP-ADDRESS.
GO TO READ-FILE.
CLOSE-UP.
CLOSE CUR-FILE.
STOP RUN.
我被困住了，不知道如何列出所有信息。
谢谢
答案 0 :(得分：2)
请参阅http://opencobol.add1tocobol.com/#does-opencobol-support-isam以获取示例，而不是通过INDEXED文件进行扫描，并且可能http://opencobol.add1tocobol.com/#relative（不同的文件组织）
注意：这只是提示。查看START和READ NEXT以获取线索
OCOBOL >>SOURCE FORMAT IS FIXED
*> ***************************************************************
*><* ================
*><* indexing example
*><* ================
*><* :Author: Brian Tiffin
*><* :Date: 17-Feb-2009
*><* :Purpose: Fun with Indexed IO routines
*><* :Tectonics: cobc -x indexing.cob
*> ***************************************************************
identification division.
program-id. indexing.
environment division.
configuration section.
input-output section.
file-control.
select optional indexing
assign to "indexing.dat"
organization is indexed
access mode is dynamic
record key is keyfield of indexing-record
alternate record key is splitkey of indexing-record
with duplicates
.
*> ** OpenCOBOL does not yet support split keys **
*> alternate record key is newkey
*> source is first-part of indexing-record
*> last-part of indexing-record
*> with duplicates
data division.
file section.
fd indexing.
01 indexing-record.
03 keyfield pic x(8).
03 splitkey.
05 first-part pic 99.
05 middle-part pic x.
05 last-part pic 99.
03 data-part pic x(54).
working-storage section.
01 display-record.
03 filler pic x(4) value spaces.
03 keyfield pic x(8).
03 filler pic xx value spaces.
03 splitkey.
05 first-part pic z9.
05 filler pic x value space.
05 middle-part pic x.
05 filler pic xx value all "+".
05 last-part pic z9.
03 filler pic x(4) value all "-".
03 data-part pic x(54).
*> control break
01 oldkey pic 99x99.
*> In a real app this should well be two separate flags
01 control-flag pic x.
88 no-more-duplicates value high-value
when set to false is low-value.
88 no-more-records value high-value
when set to false is low-value.
*> ***************************************************************
procedure division.
*> Open optional index file for read write
open i-o indexing
*> populate a sample database
move "1234567800a01some 12345678 data here" to indexing-record
perform write-indexing-record
move "8765432100a01some 87654321 data here" to indexing-record
perform write-indexing-record
move "1234876500a01some 12348765 data here" to indexing-record
perform write-indexing-record
move "8765123400a01some 87651234 data here" to indexing-record
perform write-indexing-record
move "1234567900b02some 12345679 data here" to indexing-record
perform write-indexing-record
move "9765432100b02some 97654321 data here" to indexing-record
perform write-indexing-record
move "1234976500b02some 12349765 data here" to indexing-record
perform write-indexing-record
move "9765123400b02some 97651234 data here" to indexing-record
perform write-indexing-record
move "1234568900c13some 12345689 data here" to indexing-record
perform write-indexing-record
move "9865432100c13some 98654321 data here" to indexing-record
perform write-indexing-record
move "1234986500c13some 12349865 data here" to indexing-record
perform write-indexing-record
move "9865123400c13some 98651234 data here" to indexing-record
perform write-indexing-record
*> close it ... not necessary, but for the example
close indexing
*> clear the record space for this example
move spaces to indexing-record
*> open the data file again
open i-o indexing
*> read all the duplicate 00b02 keys
move 00 to first-part of indexing-record
move "b" to middle-part of indexing-record
move 02 to last-part of indexing-record
*> using read key and then next key / last key compare
set no-more-duplicates to false
perform read-indexing-record
perform read-next-record
until no-more-duplicates
*> read by key of reference ... the cool stuff
move 00 to first-part of indexing-record
move "a" to middle-part of indexing-record
move 02 to last-part of indexing-record
*> using start and read next
set no-more-records to false
perform start-at-key
perform read-next-by-key
until no-more-records
*> read by primary key of reference
move "87654321" to keyfield of indexing-record
*>
set no-more-records to false
perform start-prime-key
perform read-previous-by-key
until no-more-records
*> and with that we are done with indexing sample
close indexing
goback.
*> ***************************************************************
*><* Write paragraph
write-indexing-record.
write indexing-record
invalid key
display
"rewrite key: " keyfield of indexing-record
end-display
rewrite indexing-record
invalid key
display
"really bad key: "
keyfield of indexing-record
end-display
end-rewrite
end-write
.
*><* read by alternate key paragraph
read-indexing-record.
display "Reading: " splitkey of indexing-record end-display
read indexing key is splitkey of indexing-record
invalid key
display
"bad read key: " splitkey of indexing-record
end-display
set no-more-duplicates to true
end-read
.
*><* read next sequential paragraph
read-next-record.
move corresponding indexing-record to display-record
display display-record end-display
move splitkey of indexing-record to oldkey
read indexing next record
at end set no-more-duplicates to true
not at end
if oldkey not equal splitkey of indexing-record
set no-more-duplicates to true
end-if
end-read
.
*><* start primary key of reference paragraph
start-prime-key.
display "Prime < " keyfield of indexing-record end-display
start indexing
key is less than
keyfield of indexing-record
invalid key
display
"bad start: " keyfield of indexing-record
end-display
set no-more-records to true
not invalid key
read indexing previous record
at end set no-more-records to true
end-read
end-start
.
*><* read previous by key of reference paragraph
read-previous-by-key.
move corresponding indexing-record to display-record
display display-record end-display
read indexing previous record
at end set no-more-records to true
end-read
.
*><* start alternate key of reference paragraph
start-at-key.
display "Seeking >= " splitkey of indexing-record end-display
start indexing
key is greater than or equal to
splitkey of indexing-record
invalid key
display
"bad start: " splitkey of indexing-record
end-display
set no-more-records to true
not invalid key
read indexing next record
at end set no-more-records to true
end-read
end-start
.
*><* read next by key of reference paragraph
read-next-by-key.
move corresponding indexing-record to display-record
display display-record end-display
read indexing next record
at end set no-more-records to true
end-read
.
end program indexing.
答案 1 :(得分：1)
好的，IBM Cobol手册，我认为IBM由于VSAM而在线提供。搜索＆＃34;语言参考＆＃34;和＆＃34;编程指南＆＃34;对于您的编译器版本（作为每个编译列表的首页）。
您需要阅读KEY以查找单个记录，或者，如果您有记录组，您还可以使用READ with key / START和READ NEXT。如果您只有部分密钥，则使用START和READ NEXT。 Brian已经提出了这一点。
你在学习Cobol吗？你应该把工作放在避免GO TO和格式化你的程序上，每行只有一个动词，这有助于你进一步减少句号/句号（看看Brian的例子＆＃34;全程停止只有＆＃34;在每个段落的末尾，除了段落/ SECTIONS和PROCEDURE DIVISION声明本身之外，这是你需要的最多句号，并且如果你没有段落/ SECTIONS则结束程序。< / p>
有一件事你不应该从Brian的代码中复制，这是一个＆＃34;环境＆＃34;事情。在大型机上，如果您在文件打开之前或关闭之后访问记录区域，您将获得S0C4异常终止（除非它是仅具有APPLW WRITE的QSAM文件，直接或通过AWO编译选项）
在阅读之前无需将记录区域设置为初始值。