Widen character.
  Converts argument c to its locale equivalent.
  If basic template basic_ios is used with an specialization other than char the function also performs the appropiate conversion from char to the char_type used.

Parameters.

c

char type character to be widened.

Return Value.
  The locale equivalent for c

Basic template member declaration ( basic_ios<charT,traits> ):

typedef charT char_type; char_type widen ( char c ) const;

See also.
  narrow
  ios class