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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;
int main()
// open file ``example.dat'' for reading and writing
filebuf buffer;
ostream output(&buffer);
istream input(&buffer); ("example.dat", ios::in | ios::out | ios::trunc);
for (int i=1; i<=4; i++) {
// write one line
output << i << ". line" << endl;
// print all file contents
input.seekg(0); // seek to the beginning
char c;
while (input.get(c)) {
cout << endl;
input.clear(); // clear eofbit and failbit