filebuf.cpp

希望我上传的这些东西可以对搞编程的程序员有点小小的帮助！谢谢！

#include "stlexam.h"
#pragma hdrstop
/***************************************************************************
 *
 * filebuf.cpp - basic_filebuf example
 *               See Class Reference Section
 *
 ***************************************************************************
 *
 * (c) Copyright 1994, 1998 Rogue Wave Software, Inc.
 * ALL RIGHTS RESERVED
 *
 * The software and information contained herein are proprietary to, and
 * comprise valuable trade secrets of, Rogue Wave Software, Inc., which
 * intends to preserve as trade secrets such software and information.
 * This software is furnished pursuant to a written license agreement and
 * may be used, copied, transmitted, and stored only in accordance with
 * the terms of such license and with the inclusion of the above copyright
 * notice.  This software and information or any other copies thereof may
 * not be provided or otherwise made available to any other person.
 *
 * Notwithstanding any other lease or license that may pertain to, or
 * accompany the delivery of, this computer software and information, the
 * rights of the Government regarding its use, reproduction and disclosure
 * are as set forth in Section 52.227-19 of the FARS Computer
 * Software-Restricted Rights clause.
 * 
 * Use, duplication, or disclosure by the Government is subject to
 * restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in
 * Technical Data and Computer Software clause at DFARS 252.227-7013.
 * Contractor/Manufacturer is Rogue Wave Software, Inc.,
 * P.O. Box 2328, Corvallis, Oregon 97339.
 *
 * This computer software and information is distributed with "restricted
 * rights."  Use, duplication or disclosure is subject to restrictions as
 * set forth in NASA FAR SUP 18-52.227-79 (April 1985) "Commercial
 * Computer Software-Restricted Rights (April 1985)."  If the Clause at
 * 18-52.227-74 "Rights in Data General" is specified in the contract,
 * then the "Alternate III" clause applies.
 *
 **************************************************************************/
 
#include<iostream>
#include<fstream>

int main ( )
{
#ifndef _RWSTD_NO_NAMESPACE
  using namespace std;
#endif 


  // create a read/write file-stream object on tiny char
  // and attach it to the file "filebuf.out"
  ofstream out("filebuf.dat",ios_base::in |
               ios_base::out | ios_base::trunc );

  // tie the istream object to the ofstream object
  istream in(out.rdbuf());   

  // output to out
  out << "Il errait comme un ame en peine";
  
  // seek to the beginning of the file
  in.seekg(0);

  // output in to the standard output
  cout << in.rdbuf() << endl;

  // close the file "filebuf.out"
  out.close();

  // open the existing file "filebuf.out"
  // and truncate it
  out.open("filebuf.dat",ios_base::in |
           ios_base::out | ios_base::trunc);

  // set the buffer size
  out.rdbuf()->pubsetbuf(0,4096);
 
  // open the source code file
  ifstream ins("filebuf.cpp");

  //output it to filebuf.out
  out << ins.rdbuf();
  
  // seek to the beginning of the file
  out.seekp(0);

  // output the all file
  cout << out.rdbuf();  
  
  return 0;
}