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Label Records / Disk Directory:
The most important information stored in the header label is what is termed as the file title. In the situation of magnetic-disk files the labels normally do not exist (there are lots of exceptions). As, more than one file is stored on a disk pack, the Input-Output control system also maintains a disk directory for all the files.
File- Section &Working-Storage Section: a) FILE SECTION: The FILE SECTION includes the explanation of all data items that must be read from or written onto some external
Program for Sequential File Creation & Rewriting We have to write a program to create a Length file with just two fields: l (Length) and l-c (Length-Code). Add a few records.
Comparison of Nonnumeric Operands: A nonnumeric operand can be compared to the other nonnumeric operand according to the rules as shown below: (i) Fields of Equal Sizes:
, (Comma) : A comma, whenever used in a picture, is considered as an insertion character and inserted wherever it become visible. There can be more than one comma in the pictu
Format for COBOL Programs: The COBOL is a high-level language. Therefore, a COBOL program can be executed on a computer for which a COBOL compiler exists. The compiler transla
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
MULTI-DIMENSIONAL TABLES: The type of table which has been considered above is known as one-dimensional table. Whenever a table is such that each of its elements in turn is a
Example of Accept statement: For illustration, ACCEPT FLAG-A can be specified to read the value of the FLAG_A from the console. It may be keep in mind that no file definition
Encryption and Decryption
COMPUTE VERB: The COMPUTE verb is very powerful. All the evaluations performed by the other 4 verbs can also be completed easily by using the COMPUTE verb. Its normal format i
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