Re: how to delete entry from binary file

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#11216

From: Asger J�rgensen
Date: Fri, 20 Feb 2004 03:17

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Hi ScOe

  In article <40355519@newsgroups.borland.com>,  ScOe says :

> I'm using fwrite to write structure to file, I also use fread to retreive
> it. But i dont know how to delete it.
> For example i write few objects into file, and than i want to delete 5th
> object from file.
> I set pointer to that position as:
> fseek(stream, sizeof (myStruct) * objectnum, 0);
> after that i want to delete sizeof (myStruct) number of bytes from file. How

In adition to what Remy said, i will just say that unless 
You are planning on having a huge amount of data in the file
(over 1 MB) You are better of having a list or a vector 
containing all Your structs and then at apropriate time
save the lot to the file overwriting whats already there.
The file aproach is very very slow compared to having
every thing in memory.

Best regards
Asger

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From: Asger J�rgensen <Asger.Pnotthis@AJ-World.dk>
Newsgroups: borland.public.cppbuilder.nativeapi
Subject: Re: how to delete entry from binary file
Date: Fri, 20 Feb 2004 04:17:18 +0100
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