#include <iostream>
#include <fstream>
#include <string>
#include <map>

using namespace std;

class StudentInfo
{

private:
    string fileName;
    int const static size = 5;
    string lastname;
    double grades[size];
    map<string, double> students;
    double AvarageGrade(double const arr[]); // liczenie sredniej

public:
    StudentInfo(string name);
    void DisplayResults(); // wyswietlanie wynikow
    map<string, double> LoadStudents(); // obsluga pliku, zapisywanie do kolekcji

};

StudentInfo::StudentInfo(string name) {
    fileName = name;
    LoadStudents();
};

map<string, double> StudentInfo::LoadStudents() {

    ifstream file;

    file.open(fileName + ".txt", ios::in);
    if(!file.good()) {
            string wyjatek = "Wystapil problem z otwarciem pliku.";
            throw wyjatek;
    }

    while( file >> lastname >> grades[0] >> grades[1] >> grades[2] >> grades[3] >> grades[4] )
    {
        double k = AvarageGrade(grades);

        students[lastname] = k;
    }

    return students;
}


void StudentInfo::DisplayResults() {

    for( const auto &student : students){
        cout<<student.first << " ma srednia " << student.second<<endl;
    }

}

double StudentInfo::AvarageGrade(double const grades[]) {
    double tmp;
    double avarage;
    string wyjatek = "Zla ocena, poza zakrezem 0 - 6.";
    for(int i = 0; i < size; i++){
        if(grades[i] > 6 || grades[i]<0)
            throw wyjatek;
        tmp += grades[i];
    }
    avarage = tmp/size;
    return avarage;
}

int main() {

    StudentInfo foo("studenci");

    try {
        foo.DisplayResults();
    }
    catch(string e) {
            cout<< e;
    }
    return 1;
}