#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <locale.h>
#define STR_LEN 40
#define NUMB_SUBJECT 5
#define NAME_STRING "Name"
#define SURNAME_STRING "Surname"
#define GROUP_STRING "Group"
#define SCORE_STRING "Score"
typedef struct
{
    char name[STR_LEN];
    char surname[STR_LEN];
    char group[STR_LEN];
    float score[NUMB_SUBJECT];
    float average;
} student;
typedef struct
{

    char name[STR_LEN];

} subject;

int main()
{
    unsigned int NUMB_STUDENTS, i, j;
    printf("Enter the number of students: ");
    scanf("%i", &NUMB_STUDENTS);
    getchar();
    if (NUMB_STUDENTS < 4)
    {
        printf("Minimum number of students is 4!");
        return 1;
    }
    student students[NUMB_STUDENTS], tmp;
    printf("Enter Subjects:\n");
    subject subjects[NUMB_SUBJECT];
    int k;
    for (i = 0; i < NUMB_SUBJECT; i++)
    {
        printf("Subject #%i: ", i + 1);
        scanf("%s", &subjects[i].name);
        getchar();
    }
    printf("Enter first name, last name, group and grade of the subject:\n");
    for (i = 0; i < NUMB_STUDENTS; i++)
    {
        printf("Student #%i:\nName: ", i + 1);
        scanf("%s", &students[i].name);
        printf("Surname: ");
        scanf("%s", &students[i].surname);
        printf("Group: ");
        scanf("%s", &students[i].group);
        {
            for (j = 0; j < NUMB_SUBJECT; j++)
            {
                printf("Assessment in %s ===> ", subjects[j].name);
                scanf("%f", &students[i].score[j]);
                if (students[i].score[j] > 12 || students[i].score[j] < 1)
                {
                    printf("You enter wrong score!");
                    return 1;
                }
            }
            getchar();
        }
    }
    printf("%-12s %-12s %-12s ", NAME_STRING, SURNAME_STRING, GROUP_STRING);
    for (i = 0; i < NUMB_SUBJECT; i++)
        printf("%-12s", subjects[i].name);
    printf("\n");
    for (i = 0; i < NUMB_STUDENTS; i++)
    {
        printf("%-12s %-12s %-12s ", students[i].name, students[i].surname, students[i].group);
        for (j = 0; j < NUMB_SUBJECT; j++)
            printf(" %-10.0f ", students[i].score[j]);
        printf("\n");
    }
    float amount = 0;
    for (i = 0; i < NUMB_STUDENTS; i++)
    {
        for (j = 0; j < NUMB_SUBJECT; j++)
            amount += (students[i].score[j]);
        students[i].average = amount / NUMB_SUBJECT;
        amount = 0;
    }
    printf("\nAverage grade of students (column Score)\n");
    printf("\n%-12s %-12s %-12s ", NAME_STRING, SURNAME_STRING, GROUP_STRING);
    for (i = 0; i < NUMB_SUBJECT; i++)
    {
        printf("%-12s", subjects[i].name);
        if (i == NUMB_SUBJECT - 1)
            printf("%-12s", SCORE_STRING);
    }
    printf("\n");
    for (i = 0; i < NUMB_STUDENTS; i++)
    {
        printf("%-12s %-12s %-12s ", students[i].name, students[i].surname, students[i].group);
        for (j = 0; j < NUMB_SUBJECT; j++)
            printf(" %-10.0f ", students[i].score[j]);
        printf("%-11.1f", students[i].average);
        printf("\n");
    }
    for (i = 0; i < NUMB_STUDENTS - 1; i++)
        for (j = 0; j < NUMB_STUDENTS - i - 1; j++)
            if (students[j + 1].average > students[j].average)
            {
                tmp = students[j];
                students[j] = students[j + 1];
                students[j + 1] = tmp;
            }
    printf("\nStudents are ranked in order of increasing the grade point average per session\n");
    printf("\n%-12s %-12s %-12s ", NAME_STRING, SURNAME_STRING, GROUP_STRING);
    for (i = 0; i < NUMB_SUBJECT; i++)
    {
        printf("%-12s", subjects[i].name);
        if (i == NUMB_SUBJECT - 1)
            printf("%-12s", SCORE_STRING);
    }
    printf("\n");
    for (i = 0; i < NUMB_STUDENTS; i++)
    {
        printf("%-12s %-12s %-12s ", students[i].name, students[i].surname, students[i].group);
        for (j = 0; j < NUMB_SUBJECT; j++)
            printf(" %-10.0f ", students[i].score[j]);
        printf("%-11.1f", students[i].average);
        printf("\n");
    }
    printf("\n\n Press any key: ");
    _getch();
    return 0;
}