fread(3s)fread(3s)Name
fread, fwrite - buffered binary input/output
Syntax
#include <stdio.h>
size_t fread(ptr, size, nitems, stream)
void *ptr;
size_t size, nitems;
FILE *stream;
size_t fwrite(ptr, size, nitems, stream)
void *ptr;
size_t size, nitems;
FILE *stream;
Description
The function reads into a block beginning at ptr, nitems of data of the size size (usually sizeof *ptr) from the named input stream. It
returns the number of items actually read.
If stream is stdin and the standard output is line buffered, then any partial output line will be flushed before any call to to satisfy the
The function appends, at most, nitems of data of the size size (usually sizeof *ptr) beginning at ptr to the named output stream. It
returns the number of items actually written.
Return Values
The and functions return 0 upon end of file or error.
See Alsoread(2), write(2), fopen(3s), getc(3s), gets(3s), printf(3s), putc(3s), puts(3s), scanf(3s)fread(3s)
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FREAD(3S)FREAD(3S)NAME
fread, fwrite - buffered binary input/output
SYNOPSIS
#include <stdio.h>
fread(ptr, sizeof(*ptr), nitems, stream)
FILE *stream;
fwrite(ptr, sizeof(*ptr), nitems, stream)
FILE *stream;
DESCRIPTION
Fread reads, into a block beginning at ptr, nitems of data of the type of *ptr from the named input stream. It returns the number of items
actually read.
If stream is stdin and the standard output is line buffered, then any partial output line will be flushed before any call to read(2) to
satisfy the fread.
Fwrite appends at most nitems of data of the type of *ptr beginning at ptr to the named output stream. It returns the number of items
actually written.
SEE ALSO read(2), write(2), fopen(3S), getc(3S), putc(3S), gets(3S), puts(3S), printf(3S), scanf(3S)DIAGNOSTICS
Fread and fwrite return 0 upon end of file or error.
4th Berkeley Distribution May 15, 1985 FREAD(3S)
Hi...
I am trying to read a binary data that have different types of messages of different lengths. I am using fread() but this functions needs the size and count to read the buffer from the file. I think this may cause that the buffer overlaps other messages.
Is there an alternative to read... (1 Reply)
Hi mates,
I am a new comer of this forums.
I have a problem while using function "fread(buffer, size, number, file-pointer)" to read a binary file.
While I used the "fread()" to read the binary file under Solaris UNIX System, it worked very well. But it gets a incorrect result... (6 Replies)
hi everybody!
i need to read a specific line from a text file using C. can any one suggest how to do it.
i m aware abt fread(), fwrite(), fseek()... but using these allows the pointer to be moved 1 character at a time. Is there a way i could jump directly to a line if i know the line number?... (4 Replies)
hi i have a vsam file i want to read the records in that file using C++ code, i use fopen and fread but it is throwing error. if any one worked on it plz tell me how to open that file using c++ code. (0 Replies)
what is the difference between
fopen and open
fread and read
fwrite and write
open and create
why this much of functions for the i/o when everything does the same...?
What is their major difference?
In which case, which is the best to use.
:confused:'ed Collins (2 Replies)
i have been googling, and came to the conclusion that there is not standard C library (or commonly used) that reads a complete line of a file, without a size parameter being involved.
so, as a little exercise i decided to think it over, and make my own
i came up with an idea, and wanted to... (2 Replies)
When fread is used twice, the second time it seems to overwrite the first time's output. Is there any way to clear fread's internal buffer after each use ?
char *FILEREAD(const char *FILENAME)
{
static char READBUFFER = "";
READBUFFER = '\0'; // try to solve the problem but this will not... (2 Replies)
Hello,
I am trying to read a text file into linked list, but always got the first and last records wrong.
1) The problem looks related to the initialization of the node temp with malloc(), but could not figure it out. No error/warning at compiling, though.
2) The output file is empty,... (10 Replies)