/*************
CSC 116
Assignment 8 - GPA Calculator
**************/
#include <iostream>
#include <ctime>
using namespace std;

int main(void)
{
    int semestercredits;
    int gradepoints;
    int semesterpoints;
    int semester;
    int credits;
    int gradenum;
    int classes;
    int overallcredits;
    int overallpoints;
    float overallgpa;
    float gpa;
    char grade;


    overallgpa = 0;
    overallpoints = 0;
    overallcredits = 0;
    classes = 0;

    cout << "How many semesters?: ";
    cin >> semester;
    do
    {
        gpa = 0;
        semesterpoints = 0;

        semestercredits = 0;


        cout << "How many how classes this semester?: ";
        cin >> classes;
            do
            {
                gradenum = 0;
                gradepoints = 0;
                grade = 0;
                credits = 0;

                // Ask for the grade letter and convert it to a number //
                cout << "Enter in the grade of the class: ";
                cin >> grade;
                switch (grade)
                {
                    case 'A':
                        gradenum = 4;
                        break;
                    case 'a':
                        gradenum = 4;
                        break;
                    case 'B':
                        gradenum = 3;
                        break;
                    case 'b':
                        gradenum = 3;
                        break;
                    case 'C':
                        gradenum = 2;
                        break;
                    case 'c':
                        gradenum = 2;
                        break;
                    case 'D':
                        gradenum = 1;
                        break;
                    case 'd':
                        gradenum = 1;
                        break;
                    default:
                        gradenum = 0;
                }
                // **************************************************** //

                cout << "Enter how many the credits the class is worth: ";
                cin >> credits;
                gradepoints = gradenum * credits;
                semesterpoints += gradepoints;
                semestercredits = semestercredits + credits;
                classes = classes -1;

                /* Debug

                cout << gradepoints << "\n"; // Debug gradepoints //
                cout << semesterpoints << "\n"; // Debug semesterpoints //

                */

            } while(classes > 0);

            // Output the GPA for the semester //
            gpa = (float)semesterpoints/semestercredits;
            cout << "Your gpa this semester is: " << gpa << endl;
            overallpoints = overallpoints + semesterpoints;
            overallcredits = overallcredits + semestercredits;
            semester = semester -1;
            // ******************************* //

    } while (semester > 0);

    // Output Cumulative GPA //
    overallgpa  = (float)overallpoints/overallcredits;
    cout << "Cumulative GPA is: " << overallgpa << endl;
    // ********************* //

    system("pause");
    return 0;
}