#include <string.h>

#include <locale.h>

#include <stdlib.h>



/*

 * The following example uses the wcsspn subroutine to determine

 * the number of wide characters in the initial segment of a wide

 * character string segment:

 */

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

    wchar_t pwcs1[128] = L"Hello World!",

            pwcs2[128] = L"Hello";

    size_t count;

 

    setlocale(LC_ALL, "");

    /*

     *  Let pwcs1 point to a wide character null terminated string.

     *  Let pwcs2 be initialized to the wide character string

     *  that contains wide characters to search for.

     */

    count = wcsspn(pwcs1, pwcs2);

    /*

     *  count contains the length of the segment.

     */

    printf("Length of the segment: %z\n", count);

    return (0);

}