Standard C++ Library Overview
All C++ library entities are declared or defined in one or more standard headers. This implementation includes two additional headers, <hash_map> and <hash_set>, that are not required by the C++ Standard. For a complete list of headers that this implementation supports, see Standard C++ Library Header Files.
A freestanding implementation of the C++ library provides only a subset of these headers:
<cstdlib> (declaring at least the functions abort, atexit, and exit)
The C++ library headers have two broader subdivisions:
This section contains the following sections:
For more information about Visual C++ run-time libraries, see CRT Library Features.