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Top Forums Programming I need help with file reading/writing in C Post 302338067 by matrixmadhan on Monday 27th of July 2009 04:33:02 AM
Old 07-27-2009
Quote:
Please help me, it's urgent!
This is not encouraged here.

I might have not understood your problem completely, please correct me if am wrong.
From what I have read from the question you have posted,
its dump data read from structure to a file
keep appending the data read from structure again
close the file
open it and read the data structure again ...

For all these you have libraries,
fopen - in append mode
fwrite
fclose
fread
 

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FREAD(3)						     Linux Programmer's Manual							  FREAD(3)

NAME
fread, fwrite - binary stream input/output SYNOPSIS
#include <stdio.h> size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream); size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream); DESCRIPTION
The function fread reads nmemb elements of data, each size bytes long, from the stream pointed to by stream, storing them at the location given by ptr. The function fwrite writes nmemb elements of data, each size bytes long, to the stream pointed to by stream, obtaining them from the loca- tion given by ptr. For non-locking counterparts, see unlocked_stdio(3). RETURN VALUE
fread and fwrite return the number of items successfully read or written (i.e., not the number of characters). If an error occurs, or the end-of-file is reached, the return value is a short item count (or zero). fread does not distinguish between end-of-file and error, and callers must use feof(3) and ferror(3) to determine which occurred. CONFORMING TO
The functions fread and fwrite conform to ANSI X3.159-1989 (``ANSI C''). SEE ALSO
read(2), write(2), feof(3), ferror(3), unlocked_stdio(3) BSD MANPAGE
1996-05-17 FREAD(3)
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