header

<iostream>

Standard Input / Output Streams Library
Header that defines the standard input/output stream objects:

Including this header may automatically include other headers, such as <ios>, <streambuf>, <istream>, <ostream> and/or <iosfwd>.
Including <iostream> automatically includes also <ios>, <streambuf>, <istream>, <ostream> and <iosfwd>.

Note that the iostream class is mainly declared in header <istream>.

Objects


Narrow characters (char)

cin
Standard input stream (object )
cout
Standard output stream (object )
cerr
Standard output stream for errors (object )
clog
Standard output stream for logging (object )

Wide characters (wchar_t)

wcin
Standard input stream (wide) (object )
wcout
Standard output stream (wide) (object )
wcerr
Standard output stream for errors (wide-oriented) (object )
wclog
Standard output stream for logging (wide) (object )