87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
/***************************************************************************
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*
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* fstream.cpp - fstream example.
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*
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* $Id: fstream.cpp 550991 2007-06-26 23:58:07Z sebor $
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*
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***************************************************************************
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*
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* Copyright 1994-2006 Rogue Wave Software.
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*
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**************************************************************************/
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#include <fstream> // for fstream
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#include <iostream> // for cout
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#include <string> // for string
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#include <examples.h>
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int main ( )
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{
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// create a bi-directional fstream object
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std::fstream inout ("test_fstream.out",
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std::ios::in | std::ios::out | std::ios::trunc);
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// write out three lines to the file
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inout << "Dieses ist die Geschichte eines Mannes.\n"
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<< "C'est l'histoire d'un homme.\n"
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<< "This is the story of a man.\n";
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std::string line;
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// seek to the beginning of the file
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inout.seekg (0);
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// extract the first line
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std::getline (inout, line);
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// output the first line to standard output
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std::cout << "\nDeutsch:\n" << line << '\n';
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// obtain current position in file
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const std::fstream::pos_type pos = inout.tellg ();
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// extract the second line
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std::getline (inout, line);
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// output the second line to standard output
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std::cout << "Francais:\n" << line << '\n';
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// extract the third line
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std::getline (inout, line);
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// output the third line to standard output
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std::cout << "English:\n" << line << '\n';
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// move the put sequence before the second line
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inout.seekp (pos);
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// replace the second and third lines
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inout << "This is the story of a man.\n"
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<< "C'est l'histoire d'un homme.";
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// seek to the beginning of the file
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inout.seekg (0);
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// output the entire contents of the fstream object's buffer to stdout
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std::cout << "\n" << inout.rdbuf () << '\n';
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return 0;
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}
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