| .OPEN (File I/O) Statement Programming Examples. |
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| OPEN (File I/O) Statement Programming Examples |
|
| These example program lines show different uses of the OPEN (File I/O) |
| statement. |
| |
| ----- Note ----- |
| Do not run these examples without the specified files and devices. |
| ---------------- |
| |
| The following statement opens MAILING.DAT as file number 1 |
| and allows data to be added without destroying what is already in |
| MAILING.DAT: |
| |
| OPEN "MAILING.DAT" FOR APPEND AS #1 |
| |
| If you wrote and installed a device driver named ROBOT, then |
| the OPEN statement might appear as |
| |
| OPEN "\\DEV\\ROBOT" FOR OUTPUT AS #1 |
| |
| To open the printer for output, you could use either of the following |
| two lines. (The first line uses the BASIC device LPT1: while |
| the second line uses the DOS device LPT1.) |
| |
| OPEN "LPT1:" FOR OUTPUT AS #1 |
| |
| OPEN "LPT1" FOR OUTPUT AS #1 |
| |
| The following statement opens the file RECORDS in random-access |
| mode, for reading only. The statement locks the file for writing, |
| but allows reading by other processes while the OPEN is in effect. |
| |
| OPEN "RECORDS" FOR RANDOM ACCESS READ LOCK WRITE AS #1 |
| |
| The following example opens the file named INVEN for input as |
| file number 2: |
| |
| OPEN "I",2,"INVEN" |
| |
