/********************************

*grades3.c

*Date: 2018/02/21

********************************/
#include <stdio.h>
#define MAX_SCORES_SIZE 5

int main()
{
    double dPercentageGrade;
    double lfMaxScore;
    double scores[MAX_SCORES_SIZE] = { 54, 68, 75, 84.3, 90.5 }; //Scores are hardcoded because we're lazy and like quick testing...
    printf("Welcome to the Grading system\n===========================\n");
    do{
        printf("Please enter the maximum possible score.\n");
        scanf("%lf", &lfMaxScore);
    }while (lfMaxScore < 0);
    for(int i = 0; i < MAX_SCORES_SIZE; i++){
        dPercentageGrade = scores[i] / lfMaxScore * 100;
        if (dPercentageGrade >= 90){
            printf("Assignment %d percentage = %.2lf%% grade = A\n", i + 1, dPercentageGrade);
        }
        else if (dPercentageGrade < 90 && dPercentageGrade >=80){
            printf("Assignment %d percentage = %.2lf%% grade = B\n", i + 1, dPercentageGrade);
        }
        else if (dPercentageGrade < 80 && dPercentageGrade >=70){
            printf("Assignment %d percentage = %.2lf%% grade = C\n", i + 1, dPercentageGrade);
        }
        else if (dPercentageGrade < 70 && dPercentageGrade >=60){
            printf("Assignment %d percentage = %.2lf%% grade = D\n", i + 1, dPercentageGrade);
        }
        else if (dPercentageGrade < 60){
            printf("Assignment %d percentage = %.2lf%% grade = F\n", i + 1, dPercentageGrade);
        }
    }
    return 0;

}