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Table of contents Previous: McBASI Interpreter Commands and Reserved Words LET Next: McBASI Interpreter Commands and Reserved Words PLOT Index

OPEN

Logically equates a unit number with the name of a text file for INPUT and OUTPUT.

Syntax

OPEN filename, unit, reclength

Parameters

filename

valid string expression, less than 13 characters

unit

valid numeric expression

reclength

valid numeric expression; only useful when

dealing with old-style or otherwise fixed length

text files; must be specified to randomly write

(PRINT) data into a file; otherwise, writing is

sequential; should be 80 when dealing with old-

style McIDAS text files, including those created

by specifying a DEV=F in McIDAS commands

Remarks

When an OPEN statement is executed, the record pointers for input and output are set to point to the first record of the file (record zero). If these options are omitted from the INPUT or PRINT statements, the next record is used.

Example

OPEN "YYEXPLE",10


Table of contents Previous: McBASI Interpreter Commands and Reserved Words LET Next: McBASI Interpreter Commands and Reserved Words PLOT Index
 
 
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