statements for sequential filesa basic operation
STATEMENTS FOR SEQUENTIAL FILES:
A basic operation on a file includes the reading and writing of its records.
Whenever the file is sequential, there are three verbs for the aim. These are READ, WRITE and REWRITE.
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file status clausethis clause has been involved in the above syntax for completeness the organization reverse access and status clause can be
block contains clauseinteger -1 of the block contains clause indicates the block size either in terms of records or in terms of characters for
data record clausethe data record clause documents the record names defined for the file for illustration data records are rec-1 rec-2 rec-3 that
nonstandard clausesthe various clauses explained above are as per the ansi standard also most compilers provide for additional nonstandard clauses to
statements for sequential filesa basic operation on a file includes the reading and writing of its recordswhenever the file is sequential there are
close statementthe simplified syntax of the close statement is as shown below close file-name-1
write statementthe write statement for tape and sequential-disk files has the syntax shown belowwrite
rewrite statementthe rewrite statement is used to update the existing record in a disk filethe normal format is as shown belowrewrie
sequential files with the variable-length recordsthe magnetic - tape or disk files can hold variable-length records in this situation the file can
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