fwrite

Defined in header `<stdio.h>`
size_t fwrite( const void buffer, size_t size, size_t count, FILE stream );		(until C99)
size_t fwrite( const void restrict buffer, size_t size, size_t count, FILE restrict stream );		(since C99)

Writes count of objects from the given array buffer to the output stream stream. The objects are written as if by reinterepreting each object as an array of unsigned char and calling fputc size times for each object to write those unsigned chars into stream, in order. The file position indicator for the stream is advanced by the number of characters written.

Parameters

buffer	-	pointer to the first object in the array to be written
size	-	size of each object
count	-	the number of the objects to be written
stream	-	pointer to the output stream

Return value

The number of objects written successfully, which may be less than count if an error occurs.

If size or count is zero, fwrite returns zero and performs no other action.

Language
headers
Type support
Dynamic memory management
Error handling
Program utilities
Variadic function support
Date and time utilities
Strings library
Algorithms
Numerics
Input/output support
Localization support
Thread support (C11)
Atomic operations (C11)
Technical Specifications