Write binary data to a stream.

This function is compatible with the following targets:

ANSI

BeOS

EMB/RTOS

Mac OS

Palm OS

Win32

#include <stdio.h>

size_t fwrite(const void *ptr, size_t size, 

Parameters for this facility are:

ptr	void *	A pointer to the item being written
size	size_t	The size of the item being written
nmemb	size_t	The number of elements being written
stream	FILE *	A pointer to a FILE stream

The fwrite() function writes nmemb items of size bytes each to stream. The items are contained in the array pointed to by ptr. After writing the array to stream, fwrite() advances the file position indicator accordingly.

If the file is opened in update mode (+) the file cannot be written to and then read from unless the write operation and read operation are separated by an operation that flushes the stream's buffer. This can be done with the fflush() function or one of the file positioning operations (fseek(), fsetpos(), or rewind()).

fwrite() returns the number of elements successfully written to stream.

"Wide Character and Byte Character Stream Orientation"

"fread"

Refer to "Example of fread() usage." for fread().