#include <stdio.h>
#include <stddef.h>
#include <locale.h>

// Шаг 1: Определение структуры Student
struct Student {
    char name[17];
    unsigned short year;
    float average_score;
    unsigned int gender : 1;
    unsigned int courses_completed;
    struct Student* group_leader;
};

// Функция для вывода информации о студенте
void print_student_info(struct Student* student, int index) {
    printf("Name: %s\n", student->name);
    printf("Year of reception: %d\n", student->year);
    printf("Average score: %.1f\n", student->average_score);
    printf("Gender (0-1): %d\n", student->gender);
    printf("Courses: %d\n", student->courses_completed);
    printf("Group leader: %p\n", student->group_leader);
    printf("\n");
}

// Функция для вывода адресов и размеров полей
void print_addresses_and_sizes(struct Student* student, int index) {
    printf("Address of element %d: %p\n", index, (void*)student);
    printf("Size of element: %lu\n", sizeof(*student));
    printf("Address of element %d:\n", index);
    printf("  name: %p\n", (void*)student->name);
    printf("  year: %p\n", (void*)&student->year);
    printf("  average_score: %p\n", (void*)&student->average_score);
    printf("  courses_completed: %p\n", (void*)&student->courses_completed);
    printf("  group_leader: %p\n", (void*)&student->group_leader);
    printf("\n");
}

// Функция для вывода шестнадцатеричного представления данных
void print_hex_representation(struct Student* student) {
    unsigned char* ptr = (unsigned char*)student;
    printf("Array size: %lu\n", sizeof(struct Student));
    for (size_t j = 0; j < sizeof(struct Student); j++) {
        printf("%02X ", ptr[j]);
        if ((j + 1) % 16 == 0) printf("\n");
    }
    printf("\n");
}

// Функция для вывода двоичного представления данных
void print_binary_representation(struct Student* student) {
    unsigned char* ptr = (unsigned char*)student;
    for (size_t j = 0; j < sizeof(struct Student); j++) {
        for (int i = 7; i >= 0; i--) {
            printf("%d", (ptr[j] >> i) & 1);
        }
        printf(" ");
    }
    printf("\n");
}

int main() {
    setlocale(LC_ALL, "Russian");

    // Шаг 3: Объявление и заполнение массива структур Student
    struct Student students[3] = {
        {"Alex", 2020, 4.5, 0, 2, NULL},
        {"Julia", 2021, 3.8, 1, 1, NULL},
        {"Sofia", 2022, 4.2, 1, 3, NULL}
    };

    // Установим старосту для Alex и Julia
    students[0].group_leader = &students[2];
    students[1].group_leader = &students[2];

    // Шаг 4: Вывод информации
    printf("Array size: %lu\n", sizeof(students));
    printf("Address of array: %p\n", (void*)students);

    for (int i = 0; i < 3; i++) {
        print_student_info(&students[i], i);
        print_addresses_and_sizes(&students[i], i);
        print_hex_representation(&students[i]);
        print_binary_representation(&students[i]);
    }

    return 0;
}