Problems w/ SImple File I/O

Thanks Borje and Dorian,

that was it. It seems to be very difficult drop old habits you developed in other environments.

Thanks,

Lasse Rantanen
[email protected]

Borje is right.

Two calls to FreeFile will return the same number, unless there is an Open.. between them.


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[Borje Hagsten]

Have you checked the handles you receive in the FREEFILE loop?
My guess is you will get two identical ones there, or? Better
to get one handle, open that file and then use FREEFILE again
to get a handle for the next file.



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Hi all,

I have probably developed a blind spot in my eye, because I can't see why following does not work.

' Create a test file
    fNo(0) = FREEFILE
 
    OPEN InFile FOR OUTPUT AS #fNo(0)
 
    FOR j = 1 TO 3000 ' Write this many random alpha records
        sTemp = ""
        FOR i = 1 TO 16 ' length of one record
            sTemp = sTemp + CHR$(RND(ASC("A"), ASC("Z")))
        NEXT
        PRINT #fNo(0), sTemp
    NEXT
 
    MSGBOX InFile + " " + STR$(LOF(fNo(0))) +" bytes"
    CLOSE #fNo(0)
 
' Copy test file
    FOR I = 0 TO 1
        fNo(I) = FREEFILE
    NEXT
 
    OPEN InFile FOR INPUT AS #fNo(0)
    OPEN OutFile FOR OUTPUT AS #fNo(1)
 
    ' **** Following does not work ******
    ' Nothing gets written into OutFile
    WHILE NOT EOF(fNo(0))
        LINE INPUT #fNo(0), sTemp
        PRINT #fNo(1), sTemp
    WEND
 
    CLOSE #fNo(0)
     
    MSGBOX OutFile + " " + STR$(LOF(fNo(1))) +" bytes"
    CLOSE #fNo(1)

TIA
Lasse Rantanen
[email protected]