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Example of Open statement:
Illustration:
The OPEN INPUT TRANSACTION, OLD-MASTER OUTPUT NEW-MASTER.
The illustration represents that there are two input files named the TRANSACTION and OLD-MASTER and one output file known as the NEW-MASTER. All these files are opened and these are prepared for reading or writing.
OPEN INPUT MARK-FILE.
OPEN OUTPUT RESULT-FILE.
The first OPEN statement opens the MARK-FILE in the input mode and the file is ready for the reading. The later statement makes the RESULT-FILE ready for the writing. There may be numerous OPEN statements in a program.
File volatility: File volatility associates to the number of times the updating of records are needed during some time period. File interrogation: Some files hold re
File Description for the Relative and Indexed Files: The FD entry for a relative or an indexed file is similar to that of a sequential file. Some compilers do not permit varia
Example of condition names: The illustration below is of the use of the condition names 77 MARITAL-STATUS PIC 9 88 SINGLE VALUE IS ZERO 88 MA
Rules of read statements: The next record is identified according to the rules as shown below: (i) Whenever the READ NEXT statement is the initial statement to be executed
Comparison of Numeric Operands: We are well-known with the kind of the relational condition where both the operands are numeric. The comparison in this situation is algebraic
DIVIDE VERB: The aim of the DIVIDE verb is to divide one number by the other and to store the result. There are few forms of this verb. One of its forms is as shown below:
PROGRAM FOR MASTER FILE MAINTENANCE: We have to write a program to keep the stu-file for which a record has just 2 fields,viz., rno(Roll Number) and name(Student Name). Give t
PROGRAM FOR SIZE ERROR: We have to write an easy program to elaborate the size error option. Identification division. Program- id. sizeerr. Environment division.
PROGRAM TO DEMONSTRATE SORT VERB: The file for which a record having 2 fields, viz., Account Number and Name is already available. Sort the file based on the ascending order o
REDEFINES CLAUSE: At times it may be found that two or more storage regions defined in the DATA DIVISION are not in use concurrently. In such situations only one storage regio
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