System Calls

Declaration:
size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE
*stream);
Writes data from the array pointed to by ptr to the given stream. It writes nmemb number of elements of
size size. The total number of bytes written is (size*nmemb).
On success the number of elements writen is returned. On error the total number of elements
successfully writen (which may be zero) is returned.