#include <iostream>
#include <fstream>
#include <string>
#include <cmath>
#include <cstdlib>
#include <iomanip>
using namespace std;

int main()
{
    ifstream original;
    ofstream update;

    original.open("numbers.dat");
    if(original.fail())
    {
         cout << "Failure to access input file. ";
         exit(1);
    }

    update.open("updated.dat");
    if(update.fail())
    {
         cout << "Unable to access output file. ";
         exit(1);                 
    }
    
    double n[] = {0};
    int scores = 5;
    double sum = 0;
    double average;
    
    for(int i = 0; i < scores; i++)
    {
    original >> n[i];
    update << n[i] << "haha " << endl;
    sum += n[i];
    average = sum / scores;
    }
           
    update << "The sum of the numbers is "
           << sum 
           << "\tThe average is "
           << average;
           
    original.close();
    update.close();
    
    return 0;
}

double n[] = {0};

#include <fstream>
#include <iostream>

int main()
{
    using namespace std;
    
    ifstream initial_data;
    ofstream final_data;
    
    initial_data.open("lane9.dat");
    if(initial_data.fail())
    {
                        cout << "Unable to open lane9.dat";
                        exit(1);
    }
    final_data.open("MGlane9.txt");
    if(final_data.fail())
    {
                        cout << "Unable to open MGlane9.txt";
                        exit(1);
    }
    
    int first, second;
    initial_data >> first >> second;
    final_data << "The numbers are "
               << first
               << second;
               
    initial_data.close();
    final_data.close();
    
    return 0;
}