ввод символов (character input)
Ошибки (Error)
For the conditions under which the fwscanf() functions shall fail
and may fail, refer to fgetwc(3p).
In addition, the fwscanf() function shall fail if:
EILSEQ Input byte sequence does not form a valid character.
ENOMEM Insufficient storage space is available.
In addition, the fwscanf() function may fail if:
EINVAL There are insufficient arguments.
The following sections are informative.
