localeconv
radixpoint = *localeconv()->decimal_point;
localeconv()->decimal_point, q % 100);
(void *(*)(void))localeconv, \
struct lconv *conv = localeconv();
extern struct lconv *localeconv(void);
using std::localeconv;
char decpt = *(localeconv()->decimal_point);
decpt = *(localeconv()->decimal_point);
locptr = localeconv();
struct lconv *locptr = localeconv();
locales[i].lconv = *localeconv();
lc = localeconv();
lc = localeconv();
#define getlocaledecpoint() (localeconv()->decimal_point[0])