rsize_t
(char *buf, rsize_t len))
char *gets_s(char *, rsize_t);
errno_t qsort_s(void *, rsize_t, rsize_t,
errno_t memset_s(void *, rsize_t, int, rsize_t);
_gets_s(char *buf, rsize_t n)
__ssp_real(gets_s)(char *buf, rsize_t n)
qsort_s(void *a, rsize_t n, rsize_t es, cmp_t *cmp, void *thunk)
memset_s(void *s, rsize_t smax, int c, rsize_t n)
rsize_t lim;