/////////////////////////////////////////////////////////////////////
//  reDirect.cpp  -  redirect cout to a log file using streambufs  //
//                                                                 //
//  Jim Fawcett, CSE687 - OOD, Spring 2001                         //
/////////////////////////////////////////////////////////////////////

#include <iostream>
#include <fstream>
using namespace std;

void main() {

  cout << "\n  Demonstrate Redirecting cout to a Log File "
       << "\n ============================================\n";

  cout << "\n  This output text will be displayed on cout, "
       << "\n  then redirected to a log file using streambufs."
       << "\n  Note that all output is written to cout."
       << "\n  Redirection occurs by giving cout the streambuf"
       << "\n  of the log file\n\n";

  cout << "\n  Look in LogFile.txt to see the output\n\n";

  ofstream out("LogFile.txt");
  if(out) {
    streambuf *pStreambuf = cout.rdbuf();   // save cout streambuf
    cout.rdbuf(out.rdbuf());                // give cout file's streambuf

    // The following text will be written to LogFile.txt.  You might
    // want to do something like this to give a user the option of
    // seeing output on-screen, or getting it off-line in a file.

    cout << "\n  This output text will be displayed on cout, "
         << "\n  then redirected to a log file using streambufs."
         << "\n  Note that all output is written to cout."
         << "\n  Redirection occurs by giving cout the streambuf"
         << "\n  of the log file\n\n";

    cout.rdbuf(pStreambuf);                 // restore cout streambuf
    out.close();
  }
}