// Lab #8: File It Away
// Program: READINT2.CPP

// This program reads all of the integer values in
// a user-specified file, squares them, and writes
// them back to a new file using exactly the same
// format.

#include <iostream.h>
#include <iomanip.h>
#include <fstream.h>

void read_numbers (ifstream &f);
void square_numbers (ifstream &f, ofstream &g);

// The main program initializes the input and output
// stream objects, first creating them and then
// associating them with real file names.  It calls
// the square_numbers function to create a new file
// with all of the values squared, and then calls
// ReadNumbers twice to check both files by displaying
// them on the screen.

void main()
{
	char infilename[20], outfilename[20];
	ifstream fin, fin2;
	ofstream fout;

	// Create the input file stream fin
	cout << "Please enter a file name for input: ";
	cin >> infilename;
	fin.open(infilename);
	while (fin.fail())
	{
		cout << "Cannot open " << infilename << " for reading." << endl;
		cout << "Please re-enter the file name: ";
		cin >> infilename;
		fin.open(infilename);
	}

	cout << endl;

	// Create the output file stream fout
	// You need to add this code.  Use the string variable
	// "outfilename" to hold the file name and the stream
	// object fout, as they are necessary to the following code.




	// Square the numbers in the input file stream
	square_numbers(fin, fout);

	// Close both original files
	fin.close();
	fout.close();

	// Re-open both files for reading.
	fin.open(infilename);

	// NOTE that the same file can be both written and read
	// in the same program!
	fin2.open(outfilename);

	// Display the contents of the original file
	cout << endl << endl;
	read_numbers(fin);

	// Display the contents of the new file
	cout << endl << endl;
	read_numbers(fin2);

	// Close both files
	fin.close();
	fin2.close();
}

// Place your read_numbers function from the last
// activity here.
void read_numbers (ifstream &f)
{

}

// This function should read the values from input
// file f, square them, and write them to output
// file g using the same format.
void square_numbers (ifstream &f, ofstream &g)
{

}