#include <wctype.h>
int iswlower(wint_t wch) {
return (unsigned)wch - L'a' < 26;
}
int iswupper(wint_t wch) {
return (unsigned)wch - L'A' < 26;
}
int iswpunct(wint_t wch) {
return (wch >= 33 && wch <= 47) ||
(wch >= 58 && wch <= 64) ||
(wch >= 91 && wch <= 96) ||
(wch >= 123 && wch <= 126);
}