/* Returns isupper( c ) || islower( c ) in the "C" locale.
In any other locale, also returns true for a locale-specific set of
alphabetic characters which are neither control characters, digits,
punctation, or whitespace.
*/
/* Returns isupper( c ) || islower( c ) in the "C" locale.
In any other locale, also returns true for a locale-specific set of
alphabetic characters which are neither control characters, digits,
punctation, or whitespace.
*/