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Хостинг:
wcwidth - number of column positions of a wide-character code
#include <wchar.h> int wcwidth(wchar_t wc);
The wcwidth() function determines the number of column positions required for the wide character wc. The value of wc must be a character representable as a wchar_t, and must be a wide-character code corresponding to a valid character in the current locale.
The wcwidth() function either returns 0 (if wc is a null wide-character code), or returns the number of column positions to be occupied by the wide-character code wc, or returns -1 (if wc does not correspond to a printing wide-character code).
See attributes(5) for descriptions of the following attributes:
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setlocale(3C), wcswidth(3C), attributes(5), standards(5)
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