strngbuf.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
/***************************************************************************
 *
 * stringbuf.cpp - basic_stringbuf 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<sstream>
#include<string>

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

  // create a read/write string-stream object on tiny char
  // and attach it to an ostringstream object
  ostringstream out_1(ios_base::in | ios_base::out);

  // tie the istream object to the ostringstream object
  istream in_1(out_1.rdbuf());   

  // output to out_1
  out_1 << "Here is the first ouput";

  // create a string object on tiny char 
  string  string_ex("l'heure est grave !");

  // open a read only string-stream object on tiny char
  // and initialize it
  istringstream in_2(string_ex);

  // output in_1 to the standard output
  cout << in_1.rdbuf() << endl;

  // reposition in_1 at the beginning
  in_1.seekg(0);

  // output in_2 to the standard output
  cout << in_2.rdbuf() << endl;

  // reposition in_2 at the beginning
  in_2.seekg(0);

  stringbuf::pos_type pos;

  // get the current put position
  // equivalent to
  // out_1.tellp(); 
  pos = out_1.rdbuf()->pubseekoff(0,ios_base::cur,
                                  ios_base::out);

  // append the content of stringbuffer
  // pointed at by in_2 to the one 
  // pointed at by out_1
  out_1 << ' ' << in_2.rdbuf();

  // output in_1 to the standard output
  cout << in_1.rdbuf() << endl;

  // position the get sequence
  // equivalent to
  // in_1.seekg(pos);
  in_1.rdbuf()->pubseekpos(pos, ios_base::in);

  // output "l'heure est grave !"
  cout << in_1.rdbuf() << endl << endl;  

  return 0;
}