C Lab6

#include <stdio.h>
#include <stdbool.h>
#include <string.h>


int main()
{
    int loop =14;
    int NumberOfExams = 3;
    float max = 100.00;
    float score[NumberOfExams];
    float percentage = -1;
    char quit = 'a';
    char letter = 'F';
    float total = 0;
    float avg = 0;
    char name[20];
    //int i = 0;
    int safety = 0;
    int command = 0;



    while(loop == 14){


        printf("1. Enter name\n");
        printf("2. Enter Exams\n");
        printf("3. Display Average Exam Score\n");
        printf("4. Display Summary\n");
        printf("5. Quit\n");
        scanf("%d",&command);

        if (command == 1){
            printf("Please enter your first name: ");
            scanf("%s", &name);
            //scanf("%[^\n]s",&name);
        }

        if(command == 2){
            for(int i = 0; i<NumberOfExams ;i++){

                printf("What is your score: ");

                scanf("%f", &score[i]);

                if(score[i] > max) {

                    printf("Error, score is invalid. Please reset the board\n");
                    goto end;

                }

            }

            for(int i = 0; i<NumberOfExams ; i++){

                total = total + score[i];

            }

            avg = total/NumberOfExams;

            percentage = avg/max * 100.00;

            if(avg > max) {

                printf("Error, score is invalid. Please reset the board\n");
                goto end;

            }

            else if(percentage >= 90) {

                letter = 'A';

            }

            else if(percentage >= 80) {

                letter = 'B';

            }

            else if(percentage >= 70) {

                letter = 'C';

            }

            else if(percentage >= 60) {

                letter = 'D';

            }

            else{

                letter = 'F';

            }
        }

        if(command == 3){
            printf("Your average is %0.2f%%", avg);
        }



        if(command == 4){
            printf("Hello, %s, based on your exams of %0.2f%%, %0.2f%%, and %0.2f%%. Your average was %0.2f%% with a letter grade of %c.\n", name, score[0], score[1], score[2],avg ,letter);
        }

        if(command == 5){
            loop = 49;
            goto end;
        }

        safety++;

        if(safety>20){
            break;
        }
    }

    end: printf("Program finished, press any key to quit ... ");

    getchar();
    getchar();

    scanf("%c", &quit);

    printf("\nYou pressed %c to quit the program\n", quit);

    printf("Goodbye\n");


    return 0;
}