1wcsncasecmp(s1, s1, 17) = 0 2wcsncasecmp(s1, s2, 17) = -1 3wcsncasecmp(s2, s1, 17) = 1 4wcsncasecmp(s2, s1, 15) = 0 5wcsncasecmp(s1, s2, 0) = 0 6