The Wayback Machine - https://web.archive.org/web/20200422173334/http://cplusplus.com/reference/fstream/
header

<fstream>

File streams
Header providing file stream classes:

Class templates

basic_ifstream
Input file stream (class template )
basic_ofstream
Output file stream (class template )
basic_fstream
File stream (class template )
basic_filebuf
File stream buffer (class template )

Classes

Narrow characters (char)

ifstream
Input file stream class (class )
ofstream
Output file stream (class )
fstream
Input/output file stream class (class )
filebuf
File stream buffer (class )

Wide characters (wchar_t)

wifstream
Input file stream (wide) (class )
wofstream
Output file stream (wide) (class )
wfstream
File stream (wide) (class )
wfilebuf
File stream buffer (wide) (class )