#include <iostream>
using namespace std;

int GetGrades();
int FindAverage(int, int);
int main()
{
    int averageGrade = 0;
    int numberOfGrades;
    int grade = 0;
    int totalGrades = 0;
    int average = 0;

    cout << "How many grades would you like to enter? " << endl;
    cin >> numberOfGrades;

    for (int i = 1;i <= numberOfGrades; i++)
    {
        cout << "Please enter a numeric grade: "<< endl;
        cin >> grade;
        totalGrades += grade;
    }

    averageGrade = FindAverage(totalGrades,numberOfGrades);

    if (averageGrade >= 90 && averageGrade <=100)
        cout << "Your Average Grade is: " << averageGrade << "\tYour Letter Grade is A." << endl;
    else if (averageGrade >= 80 && averageGrade <= 89)
        cout << "Your Average Grade is: " << averageGrade << "\tYour Letter Grade is B." << endl;
    else if (averageGrade >= 70 && averageGrade <= 79)
        cout << "Your Average Grade is: " << averageGrade << "\tYour Letter Grade is C." << endl;
    else if (averageGrade >= 60 && averageGrade<= 69)
        cout << "Your Average Grade is: " << averageGrade << "\tYour Letter Grade is D." << endl;
    else if (averageGrade >= 0 && averageGrade <= 59)
        cout << "Your Average Grade is: " << averageGrade << "\tYour Letter Grade is F." << endl;
    else
        cout << "Invalid Entry." << endl;
    return 0;
}

int FindAverage(int total,int number)
{
    return (total)/number;
}