From cppreference.com
< c‎ | io
Defined in header <wchar.h>
wint_t putwchar( wchar_t ch );

Writes a wide character ch to stdout

[edit] Parameters

ch - wide character to be written

[edit] Return value

ch on success, WEOF on failure.

[edit] See also

writes a character to stdout
writes a wide character to a file stream
C++ documentation for putwchar