#include <stdio.h>

void enableFlushAfterPrintf()
{
    setvbuf(stdout, 0, _IONBF, 0);
    setvbuf(stdin, 0, _IONBF, 0);
}
float getAvg(int list, float *scorearray);
float getUser( float score);
float calculatepercent(float score, float max);
char getGrade(float pt, char grade);
void printline(char line,int count);

int main()
{
    enableFlushAfterPrintf();
int option;
int score;
float scorearray[100]={0};
int list;
float ave;
char grade;
bool name_ent=false;
bool score_ent=false;
int sum;
    do
    {
        printline('A', 10);
        printf("1. Enter name\n");
        printf("2. Enter exam scores:\n");
        printf("3. Display average exam scores\n");
        printf("4. Display summary\n");
        printf("5. Quit\n");

        char name[32];

        scanf("%i", &option);

        if (1 == option)
        {
            name_ent = true;
            printf("Enter your name: ");
            scanf("%s", name);
        }
        else if (2 == option)
        {
            score_ent=true;
            printf("How many scores are there");
            scanf("%i", &list);
            if (list>100)
            {
                printf("Please enter a value of 100 or less\n");
            }
            else
            {


            for (int i=0; i<list; i++)
            {
                scorearray[i]=getUser(score);
            }
            }
        }
        else if (3==option)
        {

            if (score_ent)
            {
                printf("Your score is : %2.2f\n", getAvg(list, scorearray));
            }

        else
        {
            printf("Please use the menu to enter your score first.\n");
        }
        }
        else if (4==option)
        {
            if (score_ent && name_ent)
            {
                printf("Hello %s, according to your test scores of ", name);
                for (int i=0; i<list; i++)
                {
                    printf("%0.0f,", scorearray[i]);
                }
                printf("the average score is %2.2f with a letter grade of %c.\n", getAvg(list, scorearray), getGrade(ave,grade));
            }
            else
                    {
                        printf("Please use the menu to enter your name and score first.\n");
                    }
        }

}while (option !=5);
}

float getUser( float score)
{
   printf("What was the score of this exam?");
   scanf("%f", &score);
   return score;

}
float getAvg(int list, float *scorearray)
{
    float ave=0;
    for (int i=0; i<list; i++)
    {
 ave+=scorearray[i]/list;
    }
    return ave;
}
float calculatepercent(float score, float max)
{
float pt = score / max;
return pt;
}
char getGrade(float pt, char grade)
{
if (pt >= 90)
{
    grade = 'A';
}
else if (pt >= 80)
{
    grade = 'B';
}
else if (pt >= 70)
{
    grade = 'C';
}
else if (pt >= 60)
{
    grade = 'D';
}
else
{
    grade = 'F';
}
return grade;
}
void printline(char line, int count)
{
for (int i=0; i<count; i++)
{
    printf("%c", line);
}
printf("\n");
}