Narrow character.
  Converts localized parameter c to its standard char equivalent.
  If basic template basic_ios is used with an specialization other than char the function also performs the appropiate conversion from the char_type used to the char type.
  If parameter c has no standard char equivalent the function returns parameter default.

Parameters.

c

character to be narrowed.

default

character to be returned if c has no standard equivalent.

Return Value.
  The char type equivalent for c if any, otherwise returns default.

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

typedef charT char_type; char narrow ( char_type c, char default ) const;

See also.
  widen
  ios class