Here is a code segment that reads input from infile.dat and sends output

to outfile.dat. What changes are necessary to make the output go to

the screen? (The input is still to come from infile.dat.)

//Problem for Self Test. Copies three int numbers

//between files.

#include <fstream>

int main( )

{

using namespace std;

ifstream instream;

ofstream outstream;

instream.open("infile.dat");

outstream.open("outfile.dat");

int first, second, third;

instream >> first >> second >> third;

outstream << "The sum of the first 3" << endl

<< "numberss in infile.dat is " << endl

<< (first + second + third) << endl;

instream.close( );

outstream.close( );

return 0;

}