localeconv
extern struct lconv *localeconv(void);
char decimal_point = localeconv()->decimal_point[0];
lconv = localeconv();
lconv = localeconv();
lconv = localeconv();
lconv = localeconv();
struct lconv* lconv = localeconv();
struct lconv* lc = localeconv();
struct lconv* lc = localeconv();