lab4/task3/task3.cpp

#include <iostream>
using namespace std;

struct Student {
	char Name[17];
	uint16_t Year_of_receipt;
	float Average_score;
	uint16_t Sex : 1;
	uint16_t Finished_courses;
	Student *Team_lead;
};

char digits[] = "0123456789ABCDEF";
const uint8_t*
as_bytes(const void* data) {
	return reinterpret_cast<const uint8_t*>(data);
}

char nibble_to_hex(uint8_t i) {
	return digits[i & 0xf];
}
void print_in_hex(uint8_t byte) {
	cout << nibble_to_hex(byte >> 4)
		<< nibble_to_hex(byte & 0xf);
}
void print_in_hex(const void* data, size_t size) {
	const uint8_t *bytes = as_bytes(data);
	for (size_t i = 0; i < size; i++) {
		print_in_hex(bytes[i]);
		if ((i + 1) % 16 == 0) {
			cout << '\n';
		}
		else {
			cout << ' ';
		}
	}
}
char bit_digit(uint8_t byte, uint8_t bit) {
	if (byte &(0x1 << bit)) {
		return '1';
	}
	return '0';
}

void print_in_binary(uint8_t byte) {
	for (int bit = 7; bit >= 0; bit--) {
		cout << bit_digit(byte, bit);
	}
}
void print_in_binary(const void* data, size_t size) {
	const uint8_t *bytes = as_bytes(data);
	for (size_t i = 0; i < size; i++) {
		print_in_binary(bytes[i]);
		if ((i + 1) % 4 == 0) {
			cout << '\n';
		}
		else {
			cout << ' ';
		}
	}
}

int main() {
	Student students[3];
	uint16_t gender;
	for (int i = 0; i < 3; i++) {
		if (i != 0) {
			cout << "Student " << i << ":\n";
			students[i].Team_lead = &students[0];
		}
		else {
			students[i].Team_lead = NULL;
			cout << "Team lead:\n";
		}
		cout << "Name: ";
		cin >> students[i].Name;
		cout << "Year of receiption: ";
		cin >> students[i].Year_of_receipt;
		cout << "Average score: ";
		cin >> students[i].Average_score;
		cout << "Gender (0-1): ";
		cin >> gender;
		students[i].Sex = gender;
		cout << "Courses: ";
		cin >> students[i].Finished_courses;
	}

	cout << "Array address: " << (void*)students << "\n";
	cout << "Array size: " << sizeof(students) << "\n";
	for (int i = 0; i < 3; i++) {
		cout << "Address of element " << i << ": " << (void*)&students[i] << "\n";
		cout << "Size of element: " << i << ": " << sizeof(Student) << "\n";
	}
	cout << "students[1]:\n";
	cout << "Name: address = " << (void*)&students[1].Name
		<< " offset = " << offsetof(Student, Name)
		<< " size = " << sizeof(students[1].Name) << "\nhex:\n";
	print_in_hex(&students[1].Name, sizeof(students[1].Name));
	cout << "\nIn binary:\n";
	print_in_binary(&students[1].Name, sizeof(students[1].Name));

	cout << "\n\nYear_of_receipt: address = " << (void*)&students[1].Year_of_receipt
		<< " offset = " << offsetof(Student, Year_of_receipt)
		<< " size = " << sizeof(students[1].Year_of_receipt) << "\nhex:\n";
	print_in_hex(&students[1].Year_of_receipt, sizeof(students[1].Year_of_receipt));
	cout << "\nIn binary:\n";
	print_in_binary(&students[1].Year_of_receipt, sizeof(students[1].Year_of_receipt));

	cout << "\n\nAverage_score: address = " << (void*)&students[1].Average_score
		<< " offset = " << offsetof(Student, Average_score)
		<< " size = " << sizeof(students[1].Average_score) << "\nhex:\n";
	print_in_hex(&students[1].Average_score, sizeof(students[1].Average_score));
	cout << "\nIn binary:\n";
	print_in_binary(&students[1].Average_score, sizeof(students[1].Average_score));

	cout << "\n\nFinished_courses: address = " << (void*)&students[1].Finished_courses
		<< " offset = " << offsetof(Student, Finished_courses)
		<< " size = " << sizeof(students[1].Finished_courses) << "\nhex:\n";
	print_in_hex(&students[1].Finished_courses, sizeof(students[1].Finished_courses));
	cout << "\nIn binary:\n";
	print_in_binary(&students[1].Finished_courses, sizeof(students[1].Finished_courses));

	cout << "\n\nTeam_lead: address = " << (void*)&students[1].Team_lead
		<< " offset = " << offsetof(Student, Team_lead)
		<< " size = " << sizeof(students[1].Team_lead) << "\nhex:\n";
	print_in_hex(&students[1].Team_lead, sizeof(students[1].Team_lead));
	cout << "\nIn binary:\n";
	print_in_binary(&students[1].Team_lead, sizeof(students[1].Team_lead));
	cout << "\nFull array:\n";
	print_in_hex(students, sizeof(students));
	cout << "\nIn binary:\n";
	print_in_binary(students, sizeof(students));
	cin >> gender;
	return 0;
}