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The getwchar() function is the wide-character equivalent of the
getchar(3) function. It reads a wide character from stdin and returns
it. If the end of stream is reached, or if ferror(stdin) becomes true,
it returns WEOF. If a wide-character conversion error occurs, it sets
errno to EILSEQ and returns WEOF.
For a nonlocking counterpart, see unlocked_stdio(3).
The getwchar() function returns the next wide-character from standard
input, or WEOF.
The behavior of getwchar() depends on the LC_CTYPE category of the cur-
It is reasonable to expect that getwchar() will actually read a multi-
byte sequence from standard input and then convert it to a wide charac-
GNU 1999-07-25 GETWCHAR(3)