fread, fwrite - buffered binary input/output
fread(ptr, sizeof(*ptr), nitems, stream)
fwrite(ptr, sizeof(*ptr), nitems, stream)
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
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
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)
Check Out this Related Man Page
FREAD(3) BSD Library Functions Manual FREAD(3)NAME
fread, fwrite -- binary stream input/output
Standard C Library (libc, -lc)
fread(void *restrict ptr, size_t size, size_t nitems, FILE *restrict stream);
fwrite(const void *restrict ptr, size_t size, size_t nitems, FILE *restrict stream);
The function fread() reads nitems objects, each size bytes long, from the stream pointed to by stream, storing them at the location given by
The function fwrite() writes nitems objects, each size bytes long, to the stream pointed to by stream, obtaining them from the location given
The functions fread() and fwrite() advance the file position indicator for the stream by the number of bytes read or written. They return
the number of objects read or written. If an error occurs, or the end-of-file is reached, the return value is a short object count (or
The function fread() does not distinguish between end-of-file and error; callers must use feof(3) and ferror(3) to determine which occurred.
The function fwrite() returns a value less than nitems only if a write error has occurred.
SEE ALSO read(2), write(2)STANDARDS
The functions fread() and fwrite() conform to ISO/IEC 9899:1990 (``ISO C90'').
BSD March 8, 1994 BSD
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)
Original code used fwrite instead of putc.
What is expected is that the destination file will be written to. Instead I end up with a zero length file. I'm sure there is something simple I'm missing.
int main(int argc, char... (6 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 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)