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/* The following code example is taken from the book
* "The C++ Standard Library - A Tutorial and Reference"
* by Nicolai M. Josuttis, Addison-Wesley, 1999
* (C) Copyright Nicolai M. Josuttis 1999.
* Permission to copy, use, modify, sell and distribute this software
* is granted provided this copyright notice appears in all copies.
* This software is provided "as is" without express or implied
* warranty, and with no claim as to its suitability for any purpose.
#include <iostream>
#include <fstream>
using namespace std;
void redirect(ostream&);
int main()
cout << "the first row" << endl;
cout << "the last row" << endl;
void redirect (ostream& strm)
ofstream file("redirect.txt");
// save output buffer of the stream
streambuf* strm_buffer = strm.rdbuf();
// redirect ouput into the file
strm.rdbuf (file.rdbuf());
file << "one row for the file" << endl;
strm << "one row for the stream" << endl;
// restore old output buffer
strm.rdbuf (strm_buffer);
} // closes file AND its buffer automatically
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