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#include <string>
using std::string;
 
class GradeBook {
public:
    const static int students = 10;
    GradeBook(string, const int[]);
    void setCourseName(string);
    string getCourseName();
    void displayMessage();
    void processGrades();
    int getMinimum();
    int getMaximum();
    double getAverage();
    void outputBarChart();
    void outputGrades();
private:
    string courseName;
    int grades[students];
}

#include <iostream>
#include <iomanip>
using namespace std;
 
#include "GradeBook.h"
 
GradeBook::GradeBook(string name, const int gradesArray[]) {
    setCourseName(name);
    for(int grade = 0; grade < students; grade++)
        grades[grade] = gradesArray[grade];
}
void GradeBook::setCourseName(string name) {
    courseName = name;
}
string GradeBook::getCourseName() {
    return courseName;
}
void GradeBook::displayMessage() {
    cout << "Welcome to the grade book for\n" << getCourseName() << "!" << endl;
}
void GradeBook::processGrades() {
    outputGrades();
    cout << "\nClass average is " << setprecision(2) << fixed << getAverage() << endl;
    cout << "Lowest grade is " << getMinimum()
        << "\nHighest grade is " << getMaximum() << endl;
    outputBarChart();
}
int GradeBook::getMinimum() {
    int lowGrade = 100;
    for(int grade = 0; grade < students; grade++) {
        if(grades[grade] < lowGrade)
            lowGrade = grades[grade];
    }
    return lowGrade;
}
int GradeBook::getMaximum() {
    int highGrade = 0;
    for(int grade = 0; grade < students; grade++) {
        if(grades[grade] > highGrade)
            highGrade = grades[grade];
    }
    return highGrade;
}
double GradeBook::getAverage() {
    int total = 0;
    for(int grade = 0; grade < students; grade++)
        total += grades[grade];
    return static_cast<double>(total) / students;
}
void GradeBook::outputBarChart() {
    cout << "\nGrade distributoin: " << endl;
    const int frequencySize = 11;
    int frequency[frequencySize] = {0};
    for(int grade = 0; grade < students; grade++)
        frequency[grades[grade] / 10]++;
    for(int count = 0; count < frequencySize; count++) {
        if(count == 0)
            cout << " 0-9: ";
        else if(count == 10)
            cout << " 100: ";
        else
            cout << count * 10 << "-" << (count * 10) + 9 << ": ";
        for(int stars = 0; stars < frequency[count]; stars++) 
            cout << "*";
        cout << endl;
    }
}
void GradeBook::outputGrades() {
    cout << "\nThe grades are:\n\n";
    for(int student = 0; student < students; student++)
        cout << "Student " << setw(2) << student + 1 << ": "
        << setw(3) << grades[student] << endl;
}

#include "GradeBook.h"
 
int main() {
    int gradesArray[GradeBook::students] = {87, 68, 94, 100, 83, 78, 85, 91, 76, 87};
    GradeBook myGradeBook("CS101 Introduction to C++ Programming", gradesArray);
    myGradeBook.displayMessage();
    myGradeBook.processGrades();
    return 0;
}