?? iofile.cpp
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//: C04:Iofile.cpp
// From "Thinking in C++, 2nd Edition, Volume 2"
// by Bruce Eckel & Chuck Allison, (c) 2003 MindView, Inc.
// Available at www.BruceEckel.com.
// Reading & writing one file
#include <fstream>
#include <iostream>
#include "../require.h"
using namespace std;
int main() {
ifstream in("Iofile.cpp");
assure(in, "Iofile.cpp");
ofstream out("Iofile.out");
assure(out, "Iofile.out");
out << in.rdbuf(); // Copy file
in.close();
out.close();
// Open for reading and writing:
ifstream in2("Iofile.out", ios::in);
assure(in2, "Iofile.out");
ostream out2(in2.rdbuf());
cout << in2.rdbuf(); // Print whole file
out2 << "Where does this end up?";
out2.seekp(0, ios::end);
out2 << "And what about this?";
in2.seekg(0, ios::beg);
cout << in2.rdbuf();
} ///:~
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