27 Input/output library [input.output]

27.4 Standard iostream objects [iostream.objects]

27.4.3 Wide stream objects [wide.stream.objects]

wistream wcin;

1

The object wcin controls input from a stream buffer associated with the object stdin, declared in <cstdio>.

2

After the object wcin is initialized, wcin.tie() returns &wcout. Its state is otherwise the same as required for basic_ios<wchar_t>::init ([basic.ios.cons]).

wostream wcout;

3

The object wcout controls output to a stream buffer associated with the object stdout, declared in <cstdio> ([c.files]).

wostream wcerr;

4

The object wcerr controls output to a stream buffer associated with the object stderr, declared in <cstdio> ([c.files]).

5

After the object wcerr is initialized, wcerr.flags() & unitbuf is nonzero and wcerr.tie() returns &wcout. Its state is otherwise the same as required for basic_ios<wchar_t>::init ([basic.ios.cons]).

wostream wclog;

6

The object wclog controls output to a stream buffer associated with the object stderr, declared in <cstdio> ([c.files]).