◄istream_withassign►                          ◄Up► ◄Contents► ◄Index► ◄Back►
──The Microsoft iostream Classes────────────────────────────────────────────
 
  istream& operator =( const istream& ris );
  istream& operator =( streambuf* psb );
 
  Remarks
 
  The first overloaded assignment operator assigns the specified istream
  object to this istream_withassign object.
 
  The second operator attaches a streambuf object to an existing
  istream_withassign object, and it initializes the state of the
  istream_withassign object. This operator is often used in conjunction
  with the void-argument constructor.
 
  Example 1
 
      char buffer[100];
      class xistream; // A special-purpose class derived from istream
      extern xistream xin; // An xistream object constructed elsewhere
 
      cin = xin; // cin is reassigned to xin
      cin >> buffer; // xin used instead of cin
 
  Example 2
 
      char buffer[100];
      extern filedesc fd; // A file descriptor for an open file
      filebuf fb( fd ); // Construct a filebuf attached to fd
 
      cin = &fb;     // fb associated with cin
      cin >> buffer; // cin now gets its intput from the fb file
 
  See Also
 
  ◄istream_withassign::istream_withassign►, ◄cin►
 
 
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