#include  <string.h>

#include  <locale.h>

#include  <stdlib.h>



/*

 * The following example uses the wcswidth subroutine to find

 * the display column width of a wide character string.

 */

int main(int argc, char **argv) {

    wchar_t  *pwcs;

    int      retval;

    size_t   n;

 

    setlocale(LC_ALL,  "");

    /*

     * Let pwcs point to a wide character null

     * terminated string.

     * Let n be the number of wide characters

     * whose display column width is to be determined.

     */

    retval  =  wcswidth(pwcs,  n);

    

    if (retval == -1){

        /*

         *  Error handling. Invalid wide or nonprintable

         *  character  ode encountered in the wide  

         *  character string pwcs.

         */

    }

}