Writes a specified number of items to the file.

    Format

      #include  <stdio.h>

      size_t fwrite  (const void *ptr, size_t size_of_item, size_t
                     number_items, FILE *file_ptr);

1  –  Arguments

 ptr

    A pointer to the memory location from which information is being
    written. The type of the object pointed to is determined by the
    type of the item being written.

 size_of_item

    The size, in bytes, of the items being written.

 number_items

    The number of items to be written.

 file_ptr

    A file pointer that indicates the file to which the items are
    being written.

2  –  Description

    The type size_t is defined in the header file <stdio.h> as
    follows:

    typedef unsigned int size_t

    The writing begins at the current location in the file. The items
    are written from storage beginning at the location given by the
    first argument. You must also specify the size of an item, in
    bytes.

    If the file pointed to by file_ptr is a record file, the fwrite
    function outputs at least number_items records, each of length
    size_of_item.

3  –  Return Value

    x                  The number of items written. The number of
                       records written depends upon the maximum
                       record size of the file.