Filter
Top Products
Input/Output
6-6
If
'OLD'
or
'NEW'
is
specified, the
FILE
specifier
must
be present also.
An
'OLD'
file
must
exist already; a
'NEW'
file
cannot
exist already.
The
'SCRATCH'
option
must
not
be specified with a
named
file.
When
it
is
specified with
an
unnamed
file, the file
is
connected
to
the specified
unit
for the
duration
of
program
execution
or
until a
CLOSE
statement
is
issued for the same
unit.
If
'UNKNOWN'
is
specified, the file
status
is
processor dependent.
Example:
OPEN
(3,
FllE=
'MYPROG.SRC', STATUS = 'NEW')
6.2.1.6
Access
Method
Specifier
The
format
of
the access
method
specifier
is
ACCESS = ace
where
'acc'
is
a
character
expression evaulating
to
'SEQUENTIAL'
or
'DIRECT'
(see section 6.1.2.5).
If
the
ACCESS
specifier
is
omitted,
the
default
is
'SEQUEN-
TIAL'.
If
the file already exists, the specified access
method
must
be allowable for
that
file.
For
a new file, the processor creates the file with the specified access
method.
If
the
access
method
is
'DIRECT',
the record length specifier (6.2.1.8)
must
also be pre-
sent in
'open-list.'
Example:
OPEN
(3,
FllE='MYPROG',
STATUS='NEW',
& ACCESS = 'SEQUENTIAL')
6.2.1.7
Formatting
Specifier
The
formatting
specifier states whether a file
is
being connected for
formatted
or
un-
formatted
input/
output.
Its
format
is
FORM =
(mat
where
'fmat'
is
a
character
expression evaluating
to
'FORMATTED'
or
'UN-
FORMATTED'.
If
the
FORM
specifier
is
omitted,
the
default
value is
'UN-
FORMATTED'
when the file
is
being connected for direct access,
and
'FORMAT-
TED'
when the file
is
being connected for sequential access.
If
the file already exists, the specified
formatting
must be legal for
that
file.
For
a
new file, the processor creates the file with the specified
formatting.
Example:
OPEN
(3,
FllE='MYPROG',
STATUS='NEW',
& ACCESS = 'SEQUENTIAL', FORM = 'FORMATTED')
6.2.1.8
Record
Length
Specifier
The
record
length specifier identifies the length
of
each
record
in a file being con-
nected for direct access. Its
format
is
RECl
= ree/en
where
'reelen'
is
a positive integer expression.
FORTRAN-SO