Format
#include <wchar.h> int wcwidth (const wint_t wc);
Language Level: XPG4
wcwidth determines the number of printing positions that a
graphic representation of wc occupies on a display device. Each
of the printing wide characters occupies its own number of
printing positions on a display device. The number is independent
of its location on the device.
The behavior of wcwidth is affected by the LC_CTYPE category of the current locale.
Return Value
wcwidth returns the number of printing positions
occupied by wc. If wc is a null wide character, wcwidth returns
0. If wc is not a printing wide character, wc returns -1.
Note: Under this product, the printing width is 0 for a null character, 1 for a single-byte character, and 2 for a double-byte character.
Example
This example determines the printing width for the wide
character A.
#include <stdio.h> #include <wchar.h>
int main(void)
{
wint_t wc = L'A';
printf("%lc has a width of %d\n", wc, wcwidth(wc));
return 0;
/**************************************************
The output should be similar to:
A has a width of 1 **************************************************/ }
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wcswidth -- Determine Display Width of
Wide-Character String
<wchar.h>