Re: fwrite() misses writing a byte

On Wed, 03 Oct 2007 12:33:07 +0200, Joachim Schmitz wrote:

<hemant.gaur@xxxxxxxxx> schrieb im Newsbeitrag
news:1191406222.184155.83240@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I have an application which writes huge number of bytes into the
binary files which is just some marshalled data.

int len = Data.size(); //arrary size
for (int i = 0; i < len; ++i)
fwrite(&Data[i], 1, 1, f);

[...]
Your code looks like C++ to me, so you may want to ask in comp.lang.c++
Replacing Data.size() with a constant and using a suitable
declaration for Data the code is valid C99. Also, the only draft
of the C++ standard I've seen (and probably IMO also the real one)
defines fwrite and the rest of the library as by textual inclusion
of clause 7 of the C standard. So, unless there is something wrong
with Data::size(), that's not actually a C++ problem.
(Anyway, we don't see enough code to tell what's wrong, so the
only topical answer here is "probably there's a IO error, check
the result of fwrite", and given the OP's description of the
problem it is not very unlikely.)
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