iswlower
if (iswlower(c) || iswupper(c) ||
} else if (iswlower(c) || iswupper(c) ||
while (iswlower(c) || iswupper(c) ||
if (sflag && iswlower(ch))
extern int iswlower(wint_t);
extern int iswlower(wint_t);
using std::iswlower;
using std::iswlower;
iswlower(x) ? (x) + 10 - L'a' : (x) + 10 - L'A')
iswlower(x) ? (x) + 10 - L'a' : (x) + 10 - L'A')
else if (iswlower(ch))