Grading Program

#include <stdio.h>

struct StudentGrade {
    int quiz1;
    int quiz2;
    int midterm;
    int final;
    int total, tScore;
    float q1, q2, m, f;
    float percent, avg;
    char letterGrade;
}g;

int main() {

        float Q_PERCENT = 12.5;
        float M_PERCENT = 25.0;
        float F_PERCENT = 50.0;
        int Q_SCORE = 10;
        int E_SCORE = 100;

        printf("Enter Quiz 1 score (maximum is 10): ");
        scanf("%d", &g.quiz1);
        printf("Enter Quiz 2 score (maximum is 10): ");
        scanf("%d", &g.quiz2);
        printf("Enter Midterm score (maximum is 100): ");
        scanf("%d", &g.midterm);
        printf("Enter Final score (maximum is 100): ");
        scanf("%d", &g.final);

        g.q1 = ((float)g.quiz1 / Q_SCORE * Q_PERCENT);
        g.q2 = ((float)g.quiz2 / Q_SCORE * Q_PERCENT);
        g.m = ((float)g.midterm / E_SCORE * M_PERCENT);
        g.f = ((float)g.midterm / E_SCORE * F_PERCENT);

        g.total = g.quiz1 + g.quiz2 + g.midterm + g.final;
        g.percent = g.q1 + g.q2 + g.m + g.f;

        g.tScore = Q_SCORE * 2 + E_SCORE * 2;
        float tPercent = Q_PERCENT * 2 + M_PERCENT + F_PERCENT;

        g.quiz1 = g.quiz1 > 10 ? 10 : g.quiz1;
        g.quiz1 = g.quiz1 < 0 ? 0 : g.quiz1;
        g.quiz2 = g.quiz2 > 10 ? 10 : g.quiz2;
        g.quiz2 = g.quiz2 < 0 ? 0 : g.quiz2;
        g.midterm = g.midterm > 100 ? 100 : g.midterm;
        g.midterm = g.midterm < 0 ? 0 : g.midterm;
        g.final = g.final > 100 ? 100 : g.final;
        g.final = g.final < 0 ? 0 : g.final;

        if (g.percent >= 90.0)
            g.letterGrade = 'A';
        else if (g.percent >= 80.0)
            g.letterGrade = 'B';
        else if (g.percent >= 70.0)
            g.letterGrade = 'C';
        else if (g.percent >= 60.0)
            g.letterGrade = 'D';
        else
            g.letterGrade = 'F';

        printf("\n\n");
        printf("--------------------------------------------------------------------------------------\n");
        printf("TEST\t\tTEST\t\tMAX\t\tGRADE SCORE\t\tMAXIMUM SCORE");
        printf("\nPERIOD\t\tSCORE\t\tSCORE\t\tDISTRIBUTION\t\tDISTRIBUTION\n");
        printf("--------------------------------------------------------------------------------------\n");
        printf("Quiz 1\t\t%d\t\t%d\t\t%.2f\%%\t\t\t\%.2f\%%\n", g.quiz1, Q_SCORE, g.q1, Q_PERCENT);
        printf("Quiz 2\t\t%d\t\t%d\t\t%.2f\%%\t\t\t\%.2f\%%\n", g.quiz2, Q_SCORE, g.q2, Q_PERCENT);
        printf("Midterm\t\t%d\t\t%d\t\t%.2f\%%\t\t\t\%.2f\%%\n", g.midterm, E_SCORE, g.m, M_PERCENT);
        printf("Final\t\t%d\t\t%d\t\t%.2f\%%\t\t\t\%.2f\%%\n", g.final, E_SCORE, g.f, F_PERCENT);
        printf("--------------------------------------------------------------------------------------\n");
        printf("TOTAL\t\t%d\t\t%d\t\t%.2f\%%\t\t\t%.2f\%%\n",g.total, g.tScore, g.percent, tPercent);

        printf("Average\t\t\%.2f\%%\n", ((float)g.total / g.tScore * tPercent));
        printf("Grade: \t\t%c", g.letterGrade);
        printf("\n--------------------------------------------------------------------------------------\n");


    return 0;
}