Open Watcom FORTRAN 77 Language Reference

Language Reference
It is assigned the value ’FORMATTED’ if the file is connected for formatted input/output,
the value ’UNFORMATTED’ if the file is connected for unformatted input/output, or an
undefined value if there is no connection.
FORMATTED = fmt
fmt is a character variable or character array element.
permits fmt to be a character substring.
Open Watcom FORTRAN 77 also
It is assigned the value ’YES’ if FORMATTED is included in the set of allowed forms for
the file, the value ’NO’ if FORMATTED is not included in the set of allowed forms for the
file, or ’UNKNOWN’ if Open Watcom FORTRAN 77 is unable to determine whether or not
FORMATTED is included in the set of allowed forms for the file.
UNFORMATTED = unf
unf is a character variable or character array element.
permits unf to be a character substring.
Open Watcom FORTRAN 77 also
It is assigned the value ’YES’ if UNFORMATTED is included in the set of allowed forms
for the file, the value ’NO’ if UNFORMATTED is not included in the set of allowed forms
for the file, or ’UNKNOWN’ if Open Watcom FORTRAN 77 is unable to determine
whether or not UNFORMATTED is included in the set of allowed forms for the file.
RECL = rcl
rcl is an integer variable or integer array element that is assigned the value of the record
length of the file connected for direct access. If the file is connected for formatted
input/output, the length is the number of characters. If the file is connected for unformatted
input/output, the length is measured in processor-dependent units (bytes). See the compiler
User’s Guide for a discussion of record length or size. If there is no connection or if the
file is not connected for direct access then the value is undefined. The RECL= specifier is
also allowed if the file is connected for sequential access.
NEXTREC = nr
nr is an integer variable or integer array element that is assigned the value n+1, where n
is the record number of the last record read or written on the file connected for direct
access. If the file is connected but no records have been read or written then the value is 1.
If the file is not connected for direct access or if the position of the file can not be
determined because of an input/output error then nr becomes undefined.
BLANK = blnk
blnk is a character variable or character array element. Open Watcom FORTRAN 77
also permits blnk to be a character substring.
It is assigned the value ’NULL’ if null blank control is in effect for the file connected for
formatted input/output, and is assigned the value ’ZERO’ if zero blank control is in effect
for the file connected for formatted input/output. If there is no connection, or if the file is
not connected for formatted input/output, blnk becomes undefined.
ACTION = act act is a character variable or character array element. Open Watcom FORTRAN 77 also
permits act to be a character substring.
It is assigned the value ’READ’ if data can only be read from the file, ’WRITE’ if data
can only be written from the file, and ’READWRITE’ if data can be both read and written.
96 INQUIRE Statement