#include <iostream>
#include <fstream>
#include <string>
using namespace std;
#include "prompt.h"


// sum up all numbers in given file
// rcd@cs.duke.edu

int main()
{
    // prepare input
    string filename = PromptString("Enter file name: ");
    ifstream input(filename.c_str());

    // check to see if file opened correctly
    if (input.fail())
    {
        cout << "Unable to open file " << filename << endl;
        return -1;
    }

    // initialize stats
    int sum = 0;
    int count = 0;
    int n;

    // process input
    while (input >> n)
    {
        sum += n;
        count++;
    }

    // print output
    if (count == 0)
    {
        cout << "No data found in file " << filename << endl;
    }
    else
    {
        cout << "total = " << sum << endl;
        cout << "average = " << double(sum) / count << endl;
    }

    input.close();
    return 0;
}