#define _GNU_SOURCE 1
#include <wchar.h>
#include <stdio.h>
#include <string.h>
#include <wctype.h>


int
main(void)
{
        int result = 0;
        char buf[100];
        wchar_t tmp[3];
        tmp[0] = '8';
        tmp[1] = '1';
        tmp[2] = 0;

        snprintf(buf, 100, "%S = %f", tmp, wcstof(tmp, NULL));
        printf("\"%s\" -> %s\n", buf, strcmp(buf, "81 = 81.000000") == 0 ? "okay"
                : "buggy");
        result |= strcmp(buf, "81 = 81.000000") != 0;

        return result;
}