lab04-bits/bits 3/bits 3.cpp

#include <iostream>
#include <iomanip>
#include <bitset>

using namespace std;

typedef struct Student {
	uint8_t name[17];
	uint16_t year = 2000;
	float score = 5.0;
	uint8_t sex : 1;
	uint16_t courses = 3;
	Student* starosta = 0;
};

void print_in_hex(uint8_t byte) {
	cout << setfill('0') << setw(2) << hex << (uint16_t)byte << " ";
}

void print_in_hex(const void* data, size_t size) {
	for (size_t i = 0; i < size; i++) {
		cout << setfill('0') << setw(2) << hex << (uint16_t) * ((uint8_t*)data + i) << " ";

		if ((i + 1) % 16 == 0)
			cout << endl;
	}
}

void print_in_binary(uint8_t byte) {
	cout << setfill('0') << setw(8) << bitset<8>(byte) << " ";
}

void print_in_binary(const void* data, size_t size) {
	for (size_t i = 0; i < size; i++) {
		cout << setfill('0') << setw(8) << bitset<8>(*((uint8_t*)data + i)) << " ";

		if ((i + 1) % 4 == 0)
			cout << endl;
	}
}

int main()
{
	Student group[3];

	strcpy_s((char*)group[0].name, sizeof(Student::name), "Anton");
	group[0].sex = 1;

	strcpy_s((char*)group[1].name, sizeof(Student::name), "Ivan");
	group[1].sex = 0;
	group[1].starosta = &group[0];

	strcpy_s((char*)group[2].name, sizeof(Student::name), "Sergey");
	group[2].sex = 1;
	group[2].starosta = &group[0];

	// адрес и размер массива
	void* groupAddr = &group[0];
	cout << "Array 'group' at address ";
	print_in_hex(&groupAddr, sizeof(void*));
	cout << ", size " << dec << sizeof(group) << " bytes";
	cout << endl << endl;

	// адреса и размеры всех элементов массива
	for (size_t i = 0; i < 3; i++) {
		void* groupAddr = &group[i];
		cout << "group[" << i << "] at address ";
		print_in_hex(&groupAddr, sizeof(void*));
		cout << ", size " << dec << sizeof(group[i]) << " bytes";
		cout << endl;
	}

	// для всех полей одного из элементов ...
	cout << endl << "group[1]:" << endl;
	uint8_t* recordAddr = (uint8_t*)&group[1];

	cout << ">>name at address ";
	uint8_t* fieldAddr = recordAddr + offsetof(Student, name);
	print_in_hex(&fieldAddr, sizeof(void*));
	cout << ", offset " << offsetof(Student, name) << ", size " << dec << sizeof(Student::name) << endl << "Hex: " << endl;
	print_in_hex(group[1].name, sizeof(Student::name));
	cout << endl << "Bin: " << endl;
	print_in_binary(group[1].name, sizeof(Student::name));
	cout << endl;

	cout << ">>year at address ";
	fieldAddr = recordAddr + offsetof(Student, year);
	print_in_hex(&fieldAddr, sizeof(void*));
	cout << ", offset " << offsetof(Student, year) << ", size " << dec << sizeof(Student::year) << endl << "Hex: " << endl;
	print_in_hex(&group[1].year, sizeof(Student::year));
	cout << endl << "Bin: " << endl;
	print_in_binary(&group[1].year, sizeof(Student::year));
	cout << endl;

	cout << ">>score at address ";
	fieldAddr = recordAddr + offsetof(Student, score);
	print_in_hex(&fieldAddr, sizeof(void*));
	cout << ", offset " << offsetof(Student, score) << ", size " << dec << sizeof(Student::score) << endl << "Hex: " << endl;
	print_in_hex(&group[1].score, sizeof(Student::score));
	cout << endl << "Bin: " << endl;
	print_in_binary(&group[1].score, sizeof(Student::score));
	cout << endl;

	cout << ">>courses at address ";
	fieldAddr = recordAddr + offsetof(Student, courses);
	print_in_hex(&fieldAddr, sizeof(void*));
	cout << ", offset " << offsetof(Student, courses) << ", size " << dec << sizeof(Student::courses) << endl << "Hex: " << endl;
	print_in_hex(&group[1].courses, sizeof(Student::courses));
	cout << endl << "Bin: " << endl;
	print_in_binary(&group[1].courses, sizeof(Student::courses));
	cout << endl;

	cout << ">>starosta at address ";
	fieldAddr = recordAddr + offsetof(Student, starosta);
	print_in_hex(&fieldAddr, sizeof(void*));
	cout << ", offset " << offsetof(Student, starosta) << ", size " << dec << sizeof(Student::starosta) << endl << "Hex: " << endl;
	print_in_hex(&group[1].starosta, sizeof(Student::starosta));
	cout << endl << "Bin: " << endl;
	print_in_binary(&group[1].starosta, sizeof(Student::starosta));
	cout << endl;

	// все  элементы  массива  в шестнадцатеричном  виде
	for (size_t i = 0; i < 3; i++) {
		cout << "group[" << i << "]:" << endl;
		print_in_hex(&group[i], sizeof(Student));
		cout << endl;
	}

	return 0;
}