Array Elements -Saving to File

[Ray Todd]

First: I am new to programming. I have been writing a program as a
teaching tool. I am wanting to save the elements from the below arrays
to a random access file.

DIM propclt$(NumberofProperties%)
DIM propaddress$(NumberofProperties%)
DIM propowner$(NumberofProperties%)
DIM propownermail$(NumberofProperties%)
DIM propownerphone$(NumberofProperties%)

From looking at the help files and various books, I see references to
*reading* random access files but nothing that I have seen directly
refers to writing data from array's to the random access file.

Can anyone please get me back on course...

Thanks for any help provided,

Ray.



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[Lance Edmonds]

Unfortunately, there is no native way to do this. Additionally, for dynamic strings, you cannot write raw blocks of memory to disk because dynamic strings are not stored "sequentially" in memory.

The solution is to use a standard FOR/NEXT loop, writing each string element in succession.

OPEN "datafile.dat" FOR OUTPUT AS #1
FOR x% = LBOUND(Arr1$,1) TO UBOUND(Arr1$,1)
  PRINT #1, Arr1$(x%)
NEXT x%
CLOSE #1

PS: PB/CC 3.0 does offer a way to write whole arrays to a file with a single statement (and read them back just as easily!), but there is no equivalent function in PB/DOS.

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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Mike Doty]

TYPE MyArrayStructure
  Phone  AS STRING * 10
  Person AS STRING * 30
END TYPE
CLS
DIM Record AS MyArrayStructure

LengthOfStructure = 40

NumberOfProperties& = 3
DIM PhoneArray$(NumberOfProperties&)
DIM PersonArray$(NumberOfProperties&)

FileNum = FREEFILE
OPEN "TEST.DAT" FOR RANDOM AS #FileNum LEN = LengthOfStructure

FOR Count& = 1 TO NumberOfProperties&
  PhoneArray$(Count&) = "PHONE" + STR$(Count&)    'create some data
  PersonArray$(Count&) = "PERSON" + STR$(Count&)  'data in arrays

  Record.Phone = PhoneArray$(Count&)
  Record.Person = PersonArray$(Count&)


  PUT #FileNum, Count&, Record


  GET #FileNum, Count&, Record
  PRINT Record.Phone, Record.Person
NEXT
CLOSE #FileNum

[This message has been edited by Mike Doty (edited December 10, 2002).]

[Ray Todd]

Mike,

Thank you for your post. Do I TYPE and DIM in the main module or the
subprogram that is doing the writing to the file or does it matter?

Thanks,

Ray.


[QUOTE]Originally posted by Mike Doty:

TYPE MyArrayStructure
Phone AS STRING * 10
Person AS STRING * 30
END TYPE

DIM Record AS MyArrayStructure


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