To Change A Record; Getting The Directory Of Listings; Relative Files; Relative Files - Commodore 2031 User Manual

To Change A Record:

After displaying the record, the screen displays: "ANY MODS"?
STEP 1. Type YES and press RETURN
The screen displays: "WHICH FIELD"?
Enter the number of the field you wish to change,
STEP 2. Type: 4 and press RETURN
The computer displays that field: US HEADQUARTERS
STEP 3. Press RETURN
The screen display asks if there are: "ANY MODS"?
STEP 4. IF the record is correct, type NO and press RETURN

Getting The Directory Of Listings:

The screen displays: "WHOSE RECORD DO YOU WISH TO SEE"?
Type: /DIR and press RETURN
The computer displays the directory.

Ending The Program:

The computer displays: "WHOSE RECORD DO YOU WISH TO SEE"?
Type: // and press RETURN. The program ends.

RELATIVE FILES

Direct access of relative files is a method that allows the programmer to position
to any record on the disk relative to the beginning of that file. Compare this
method to the standard procedure of having to search each track and sector for
the desired information. It becomes apparent that such a relative handling
method would result in a great reduction in the amount of time required to find
a specific record on the disk. This reduction in the amount of time
required to locate and fetch a file through the application of relative file han-
dling techniques frees the user from the major objection to using sequential disk
files: excessive "look up" time.
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