#include "genlib.h"
#include "simpio.h"
#include <iostream>
#include <conio.h>
#include <fstream>
#include <sstream>

ifstream in;
struct gradeList{
    int numGrades;
    int min;
    int max;
    double avg;
};

gradeList statTaker(ifstream &in, gradeList gList)
{
    gradeList outputList;
    int numGrades = 0;
    int gradeSum = 0;
    int maxTillNow = 0;
    int minTillNow = 100;
    while (!in.fail())
    {
        in.clear();
        string line;
        getline(in,line);
        cout << line << endl;
        stringstream ss(line);
        int thisGrade;
        ss >> thisGrade;//get integer representation of this grade
        gradeSum += thisGrade;//add grade to the running total for average
        numGrades++;//iterate count number of grades
        if (thisGrade > maxTillNow)
            maxTillNow = thisGrade;//set max
        if (thisGrade < minTillNow)
            minTillNow = thisGrade;//set min
    }
    double gradeAverage = double(gradeSum)/numGrades;
    outputList.numGrades = numGrades;
    outputList.min = minTillNow;
    outputList.max = maxTillNow;
    outputList.avg = gradeAverage;
    in.clear();
    return outputList;
}

int main()
{
    cout << "Enter score file name: ";
    string s = GetLine();
    in.open(s.c_str());
    while (in.fail())
    {
        in.clear();
        cout << "Invalid file. Enter file name: ";
        s = GetLine();
        in.open(s.c_str());
    }
    gradeList gList1;
    gradeList stats = statTaker(in, gList1);
    cout << "The average is " << stats.avg << endl << "The lowest score is " << stats.min << endl << "The highest score is " << stats.max;

    return 0;
}