practiceProgram

#include <iomanip>
#include <iostream>
#include <fstream>
#include <string>
#include <vector>

using namespace std;
void icountSumAvg(vector<double>, int, int &icount, double &sum, double &avg);
void display(int, double, double);
void display(int, double, double, vector<double>, int);
void swap(vector<double>, int);

bool testSwap = true; // displays each element if true

int main()
{
    ifstream ifile;
    const string FILENAME = "input.txt";
    ifile.open(FILENAME);
    int count = 0;
    double sum = 0, avg = 0;
    if (!(ifile.fail()))
    {
        vector<double> vect;
        double value = 0.0;
        while (!ifile.eof())
        {
            ifile >> value;
            vect.push_back(value);
        }
        int vectSize = vect.size();

        icountSumAvg(vect, vectSize, count, sum, avg);

        if (testSwap = true)
        {
            swap(vect, vectSize);
            display(count, sum, avg, vect, vectSize);
        }
        else
            display(count, sum, avg);

        ifile.close();
    }
    else
        cout << "There was an error opening the file: " << FILENAME << endl;
    system("pause");
}

void icountSumAvg(vector<double> values, int size, int &icount, double &sum, double &avg)
{
    for (int i = 0; i < size; i++)
    {
        icount++;
        sum += values[i];
    }
    avg = sum / icount;
}

void swap(vector<double> values, int size)
{
    double temp;
    for (int i = 0; i < size; i++)
    {
        for (int j = 0; j < i; j++)
        {
            if (values[j] < values[i])
            {
                temp = values[i];
                values[i] = values[j];
                values[j] = temp;
            }
        }
    }
}

void display(int count, double sum, double avg, vector<double> values, int size)
{
    for (int i = 0; i < size; i++)
    {
        cout << "Element " << i + 1 << ": " << values[i] << endl;
    }
    cout <<"Total count:        " << count << endl
        << "Total sum:          " << sum << endl
        << "Average of numbers: " << avg << endl;
}

void display(int count, double sum, double avg)
{
    cout <<"Total count:        " << count << endl
        << "Total sum:          " << sum << endl
        << "Average of numbers: " << avg << endl;
}