Name

The behavior of the wcwdith is affected by LC_CTYPE category of the current locale.

#include <wchar.h>
/* Illustrates how to use wcwidth API */
int example_wcwidth()
{  
 /* wide character for which width has to be determined */
 wchar_t wc = L’a’;
 int retval;
 /* determine the width of wc */
 retval = wcwidth(wc);
 /* return the determined width */
 return retval;
}

wint_t ch;
int column, w;
column = 0;
while ((ch = getwchar()) != WEOF) {
        w = wcwidth(ch);
        if (w > 0 && column + w >= 20) {
                putwchar(L’ \en’);
                column = 0;
        }
        putwchar(ch);
        if (ch == L’ \en’)
                column = 0;
        else if (w > 0)
                column += w;
}

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