GET

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Revision as of 17:59, 19 June 2010 by imported>Clippy
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The GET # file or port device statement reads data by bytes or record positions.


Syntax: GET #filenumber%, [location], variable_value


  • File/port number is the number used in the OPEN AS statement.
  • The byte or record location is the byte in a BINARY file or the record in a RANDOM file.
  • Location can be omitted if the GETs are consecutive or when creating a new file.
  • The variable value is any string or number type or a TYPE or FIELD variable.
  • QB64 can GET the entire data contents of an array from a PUT array file.
  • GET can ignore the EOF statement and return bad data when transferring data to another file! Always check for EOF after a GET to see if it should be PUT.


Example 1: Checking for End of File before transferring individual GET data.

DO UNTIL EOF(1) GET #1, , value% IF NOT(EOF(1)) THEN PUT #2, , value% LOOP

Example 2: Using a TYPE record variable to read a TYPE record(Contact).

OPEN file$ FOR RANDOM as #1 LEN = LEN(Contact) IF record% <= LOF(1) \ LEN(Contact) THEN GET #1, record%, Contact CLOSE #1

Note: The Contact record contains all of the DOT variable types listed in the TYPE.


Example 3: Restoring array data from a BINARY file using GET # in QB64 only.

DIM myarray(80000) AS INTEGER OPEN "myfile.ext" FOR BINARY AS #1 GET #1, , myarray() CLOSE #1

Note: The file data must have been previously stored using PUT the same way!


See also:

PUT #, SEEK, SEEK (statement)

INPUT #, GET (TCP/IP statement)




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