CIS 1.5 Sending output to a disk file

Below is a program that sends all of its output to the screen. Then there is a modified version that sends some output to a file and some to the screen. The changes that must be made for this modified version are marked by arrows.

// original version

#include <iostream>

using namespace std;

int main()

{

cout << "line 1" << endl;

cout << "line 2" << endl;

system("PAUSE");

return 0;

}

// modified version

#include <iostream>

#include <fstream> ß

using namespace std;

int main()

{

ofstream output("output.txt"); ß

output << "line 1" << endl; ß

cout << "line 2" << endl;

output.close(); ß

system("PAUSE");

return 0;

}

Where does the message saying line 1 go? Where does the message saying line 2 go? How can we make line 1 and line 2 both go to the file? How can we make them both go to the screen?