The table below lists the Intel Fortran I/O statements:
|
Category and statement name |
Description |
|
File connection |
|
|
OPEN |
Connects a unit number with an external file and specifies file connection characteristics. |
|
CLOSE |
Disconnects a unit number from an external file. |
|
File inquiry |
|
|
DEFINE FILE |
Specifies file characteristics for a direct access relative file and connects the unit number to the file, similar to an OPEN statement. Provided for compatibility with compilers older than FORTRAN-77. |
|
INQUIRE |
Returns information about a named file, a connection to a unit, or the length of an output item list. |
|
Record position |
|
|
BACKSPACE |
Moves the record position to the beginning of the previous record (sequential access only). |
|
DELETE |
Marks a record at the current record position in a relative file as deleted (direct access only). |
|
ENDFILE |
Writes an end-of-file marker after the current record (sequential access only). |
|
FIND |
Changes the record position in a direct access file. Provided for compatibility with compilers older than FORTRAN-77. |
|
REWIND |
Sets the record position to the beginning of the file (sequential access only). |
|
Record input |
|
|
READ |
Transfers data from an external file record or an internal file to internal storage. |
|
UNLOCK |
For performance reasons, this statement is not supported by Intel® Fortran. |
|
ACCEPT |
Reads input from stdin. Unlike READ, ACCEPT only provides formatted sequential input and does not specify a unit number. |
|
Record output |
|
|
WRITE |
Transfers data from internal storage to an external file record or to an internal file. |
|
REWRITE |
Transfers data from internal storage to an external file record at the current record position (direct access relative files only). |
|
TYPE |
Writes record output to stdout (same as PRINT). |
|
|
Transfers data from internal storage to stdout. Unlike WRITE, PRINT only provides formatted sequential output and does not specify a unit number. |
In addition to the READ, WRITE, REWRITE, TYPE, and PRINT statements, other I/O record-related statements are limited to a specific file organization. For instance:
The DELETE statement only applies to relative files. (Detecting deleted records is only available if the -vms option was specified when the program was compiled.)
The BACKSPACE statement only applies to sequential files open for sequential access.
The REWIND statement only applies to sequential files open for sequential access and to direct access files.
The ENDFILE statement only applies to certain types of sequential files open for sequential access and to direct access files.
The file-related statements (OPEN, INQUIRE, and CLOSE) apply to any relative or sequential file.