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size_t fwrite( void *buf, size_t size, size_t n,FILE *stream )


void *buf;        /* address of data buffer */

size_ t size;     /* size of each buffer element */

size_ t n;        /* number of buffer elements */

FILE *stream;     /* output stream */




#include "stdio.h"


The fwrite function retrieves n objects, each of size size bytes, from the buffer pointed to by buf , and writes them into the file associated with fp .




buf is the address of the buffer where the data is stored, and should be at least size * n bytes in length. size and n are integers. stream is a stream pointer, open for input.



Return Value

fwrite returns the actual number of objects written, which will be less than or equal to n .



See Also

fputs , fread