stream for hexadecimal standard output : ostream « File Stream « C++ Tutorial






/* 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()
{
    // stream for hexadecimal standard output
    ostream hexout(cout.rdbuf());
    hexout.setf (ios::hex, ios::basefield);
    hexout.setf (ios::showbase);

    // switch between decimal and hexadecimal output
    hexout << "hexout: " << 177 << " ";
    cout   << "cout: "   << 177 << " ";
    hexout << "hexout: " << -49 << " ";
    cout   << "cout: "   << -49 << " ";
    hexout << endl;
}
hexout: 0xb1 cout: 177 hexout: 0xffffffcf cout: -49








12.11.ostream
12.11.1.Define your own ostream variable
12.11.2.file descriptor out buffer
12.11.3.stream for hexadecimal standard output
12.11.4.Switch between decimal and hexadecimal output
12.11.5.Hex out stream
12.11.6.Redirect ouput into the file
12.11.7.Open file ''example.dat'' for reading and writing