Include the iostreams standard header <streambuf> to define the template class basic_streambuf, which is basic to the operation of the iostreams classes. This header is typically included for you by another of the iostreams headers; you rarely need to include it directly.
|streambuf||A specialization of
|wstreambuf||A specialization of
|basic_streambuf Class||The template class describes an abstract base class for deriving a stream buffer, which controls the transmission of elements to and from a specific representation of a stream.|