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Example of File-control:
The assign clause assigns a specific physical peripheral device name to a file. The physical peripheral device are machine-dependent. We use the device names READER, TAPE, PRINTER and DISK to mean line printer, card reader, magnetic tape and magnetic disk device respectively.
An illustration of the FILE-CONTROL paragraph is shown below.
FILE-CONTROL.
SELECT CARD-DESIGN ASSIGN TO READER
SELECT PRINTER-FILE ASSIGN TO PRINTER.
This paragraph represents that there are 2 files - CARD-DESIGN & PRINTER-FILE. The file named CARD-DESIGN is a card file whereas the other is a report file to be printed on the line printer.
Transaction file : A transaction file is a file which contains new records those changes to old records which are used to update the master file. The problem of file updatio
We have input file, record layout is EMP ID (6 char) , EMP NAME (20 char), Designation (3 char),Salary (5 digit) Base Branch (10char) Grade (3 Alphanumeric). This is the input f
Rules for constructing an Arithmetic Expression: The rules for constructing an arithmetic expression are as shown below: (i) When an arithmetic expression specifies a calcu
we have input file ,record layout is EMP ID (6 char) , EMP NAME (20 char), Designation (3 char),Salary (5 digit) Base Branch (10char) Grade (3 Alphanumeric). This is the input file
Environment Division: The Environment Division is the second division in the COBOL source program. It is mainly machine-dependent . The computer and all the peripheral dev
RULES FOR SEARCH VERB: The rules apply for the SEARCH verb is as shown below: (1) The SEARCH verb can be applied only to a table that has the OCCURS clause and INDEXED phra
Rules for Simple sort verb: The work file is to be defined by a sort elaboration entry (SD entry).The format of SD entry is as shown below. The rules below should be taken
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PERFORM STATEMENT: The PERFORM statement can be used to execute the group of consecutive statements written elsewhere in the program. We refer to this group of statements a
DECLARATIVE and FILE STATUS Clause: The input-output exception condition in the situation of a direct access files can be handled by a declarative procedure in a manner simila
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