iswalpha function — Determines whether a wide character is alphabetic
int iswalpha(wint_t wc)
The iswalpha
function
returns true (nonzero) if wc
is
an alphabetic character, that is, a wide character for which
iswcntrl
, iswdigit
, iswpunct
, and iswspace
all return false (0
).
iswcntrl function,
iswdigit function, iswpunct function, iswspace function, isalpha
in <cctype>