#include<iostream>

#include<iomanip>

#include<fstream>

#include<cstdlib>

#include<string>

#define MAX 100 // Maximum numbers in records

using namespace std;

// Defines class StudentGrade to store student information

class StudentGrade

{

    // Data member to store student information

    string firstName;

    string lastName;

    double testGrade[5];

    double average;

    double highest;

    char grade;

public:

    // Default constructor to assign default values to data member

    StudentGrade()

    {

        firstName = lastName = "";

        grade = ' ';

        average = 0.0;

        // Loops 5 time to assign parameter test score to 0

        for (int c = 0; c < 5; c++)

            testGrade[c] = 0;

    }// End of default constructor

    // Parameterized constructor to assign parameter values to data member

    StudentGrade(string fn, string ln, double tg[])

    {

        firstName = fn;

        lastName = ln;

        // Loops 5 time to assign parameter test score to data member test score

        for (int c = 0; c < 5; c++)

            testGrade[c] = tg[c];

    }// End of parameterized constructor

    // Prototype of functions

    void readFile(StudentGrade[], int&);

    void calculateGrade(StudentGrade[], int, double&);

    void showStudents(StudentGrade[], int, double);

};// End of function

// Function to read file contents and stores it in array of object

// Returns number of number read from file &len call by reference

void StudentGrade::readFile(StudentGrade sg[], int& len)

{

    string firstName;

    string lastName;

    double testGrade[5];

    // ifstream objects declared to read data from files

    ifstream fRead;

    // Opens the file for reading

    fRead.open("CSCI1306.txt");

    // Checks if the file unable to open for reading display's error message and stop

    if (!fRead)

    {

        cout << "\n ERROR: Unable to open the file for reading.";

        exit(0);

    }// End of if condition

    // Loops till end of the file

    while (!fRead.eof())

    {

        // Reads a record

        fRead >> firstName;

        fRead >> lastName;

        // Loops 5 time to read test score

        for (int c = 0; c < 5; c++)

            fRead >> testGrade[c];

        // Creates an object using parameterized constructor and assigns the object

        // at len index position

        sg[len] = StudentGrade(firstName, lastName, testGrade);

        // Increase the record counter by one

        len++;

    }// End of while loop

    // Close the file

    fRead.close();

}// End of function

// Function to calculate average, grade, highest grade

void StudentGrade::calculateGrade(StudentGrade sg[], int len, double& highestClass)

{

    // To store total

    double total;

    // Loops till number of students

    for (int c = 0; c < len; c++)

    {

        // Assigns current students first test score

        total = sg[c].testGrade[c];

        // Assigns current students first test score as highest score

        sg[c].highest = sg[c].testGrade[c];

        // Loops 5 times for test score

        for (int d = 1; d < 5; d++)

        {

            // Calculates total for current student

            total += sg[c].testGrade[d];

            // Checks if current students current test score is greater than

            // current student earlier highest score

            if (sg[c].testGrade[d] > sg[c].highest)

                // Updates the current students highest score by assigning current students

                // current test score

                sg[c].highest = sg[c].testGrade[d];

        }// End of for loop for test score

        // Checks if current students highest score is greater than earlier class highest score

        if (sg[c].highest > highestClass)

            // Assigns current student highest score to class highest score

            highestClass = sg[c].highest;

        sg[c].average = total / 5.0;

    }// End of for loop for student

    // Loops till number of students

    for (int c = 0; c < len; c++)

        // Checks test score and assigns character grade

        if (sg[c].average >= 90)

            sg[c].grade = 'A';

        else if (sg[c].average >= 80)

            sg[c].grade = 'B';

        else if (sg[c].average >= 70)

            sg[c].grade = 'C';

        else if (sg[c].average >= 60)

            sg[c].grade = 'D';

        else

            sg[c].grade = 'F';

}// End of function

// Function to display the array

void StudentGrade::showStudents(StudentGrade sg[], int len, double highestClass)

{

    // Loops till number of students

    for (int c = 0; c < len; c++)

    {

        cout << endl << endl << left << " " << setw(15) << sg[c].firstName << setw(15) << sg[c].lastName;

        // Loops 5 times for test score

        for (int d = 0; d < 5; d++)

            cout << fixed << setprecision(2) << setw(7) << sg[c].testGrade[d];

        cout << setw(4) << sg[c].grade;

        cout << "\n Hist Test Grade: " << sg[c].highest;

    }// End of for loop

    cout << "\n\n\n Highest Test Grade in class: " << highestClass;

}// End of function

// main function definition

int main()

{

    // Creates an array of object of class StudentGrade of size MAX

    StudentGrade sg[MAX];

    // To store number of records

    int len = 0;

    // To store class highest

    double highestClass = 0;

    // Calls the function to read file contents

    sg[0].readFile(sg, len);

    // Calls the function to calculate average, grade, highest score, highest class

    sg[0].calculateGrade(sg, len, highestClass);

    // Calls the function to display result

    sg[0].showStudents(sg, len, highestClass);

    return 0;

}// End of main function