#include <iostream>
#include <fstream>     // for file I/O
#include <cstdlib>     // for exit
using namespace std;
 
void copyFile(ifstream&, ofstream&);
 
int main ()
{
        ifstream in_stream;
        ofstream out_stream;
 
        in_stream.open("scores.txt");
        out_stream.open("average.txt");
 
        // This code checks for failures
        if( in_stream.fail() || out_stream.fail())
        {
                cout << "Error opening file... exiting..." << endl;
                // Exits the program
                exit(1);
        }
 
        double next, sum = 0;
        int count = 0;
 
        // The code continues until the end of the file is reached
        while(!in_stream.eof())
        {
                in_stream >> next;  // get next number
                sum = sum + next;   // keeps track of the sum
                count++;           
        }
 
        // calculate and print average
        double average = sum / count;
        cout << "average = " << average;
 
        copyFile(in_stream, out_stream);
 
        // close both streams
        in_stream.close();
        out_stream.close();
 
        return 0;
}
 
void copyFile(ifstream &fin, ofstream &fout)
{
	char temp;
 
	while(!fin.eof())
	{
		// read in one char including spaces
		// and new lines!
		fin.get(temp);  
 
		print(cout, temp);  // print to screen
		print(fout, temp);  // print to file
	}
}