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#include <iostream>
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#include <iomanip>
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#include <bitset>
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using namespace std;
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typedef struct Student {
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uint8_t name[17];
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uint16_t year = 2000;
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float score = 5.0;
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uint8_t sex : 1;
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uint16_t courses = 3;
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Student* starosta = 0;
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};
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void print_in_hex(uint8_t byte) {
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cout << setfill('0') << setw(2) << hex << (uint16_t)byte << " ";
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}
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void print_in_hex(const void* data, size_t size) {
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for (size_t i = 0; i < size; i++) {
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cout << setfill('0') << setw(2) << hex << (uint16_t) * ((uint8_t*)data + i) << " ";
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if ((i + 1) % 16 == 0)
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cout << endl;
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}
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}
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void print_in_binary(uint8_t byte) {
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cout << setfill('0') << setw(8) << bitset<8>(byte) << " ";
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}
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void print_in_binary(const void* data, size_t size) {
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for (size_t i = 0; i < size; i++) {
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cout << setfill('0') << setw(8) << bitset<8>(*((uint8_t*)data + i)) << " ";
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if ((i + 1) % 4 == 0)
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cout << endl;
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}
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}
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int main()
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{
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Student group[3];
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strcpy_s((char*)group[0].name, sizeof(Student::name), "Anton");
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group[0].sex = 1;
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strcpy_s((char*)group[1].name, sizeof(Student::name), "Ivan");
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group[1].sex = 0;
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group[1].starosta = &group[0];
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strcpy_s((char*)group[2].name, sizeof(Student::name), "Sergey");
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group[2].sex = 1;
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group[2].starosta = &group[0];
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// адрес и размер массива
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void* groupAddr = &group[0];
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cout << "Array 'group' at address ";
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print_in_hex(&groupAddr, sizeof(void*));
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cout << ", size " << dec << sizeof(group) << " bytes";
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cout << endl << endl;
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// адреса и размеры всех элементов массива
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for (size_t i = 0; i < 3; i++) {
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void* groupAddr = &group[i];
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cout << "group[" << i << "] at address ";
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print_in_hex(&groupAddr, sizeof(void*));
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cout << ", size " << dec << sizeof(group[i]) << " bytes";
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cout << endl;
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}
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// для всех полей одного из элементов ...
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cout << endl << "group[1]:" << endl;
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uint8_t* recordAddr = (uint8_t*)&group[1];
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cout << ">>name at address ";
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uint8_t* fieldAddr = recordAddr + offsetof(Student, name);
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print_in_hex(&fieldAddr, sizeof(void*));
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cout << ", offset " << offsetof(Student, name) << ", size " << dec << sizeof(Student::name) << endl << "Hex: " << endl;
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print_in_hex(group[1].name, sizeof(Student::name));
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cout << endl << "Bin: " << endl;
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print_in_binary(group[1].name, sizeof(Student::name));
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cout << endl;
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cout << ">>year at address ";
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fieldAddr = recordAddr + offsetof(Student, year);
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print_in_hex(&fieldAddr, sizeof(void*));
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cout << ", offset " << offsetof(Student, year) << ", size " << dec << sizeof(Student::year) << endl << "Hex: " << endl;
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print_in_hex(&group[1].year, sizeof(Student::year));
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cout << endl << "Bin: " << endl;
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print_in_binary(&group[1].year, sizeof(Student::year));
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cout << endl;
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cout << ">>score at address ";
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fieldAddr = recordAddr + offsetof(Student, score);
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print_in_hex(&fieldAddr, sizeof(void*));
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cout << ", offset " << offsetof(Student, score) << ", size " << dec << sizeof(Student::score) << endl << "Hex: " << endl;
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print_in_hex(&group[1].score, sizeof(Student::score));
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cout << endl << "Bin: " << endl;
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print_in_binary(&group[1].score, sizeof(Student::score));
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cout << endl;
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cout << ">>courses at address ";
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fieldAddr = recordAddr + offsetof(Student, courses);
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print_in_hex(&fieldAddr, sizeof(void*));
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cout << ", offset " << offsetof(Student, courses) << ", size " << dec << sizeof(Student::courses) << endl << "Hex: " << endl;
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print_in_hex(&group[1].courses, sizeof(Student::courses));
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cout << endl << "Bin: " << endl;
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print_in_binary(&group[1].courses, sizeof(Student::courses));
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cout << endl;
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cout << ">>starosta at address ";
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fieldAddr = recordAddr + offsetof(Student, starosta);
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print_in_hex(&fieldAddr, sizeof(void*));
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cout << ", offset " << offsetof(Student, starosta) << ", size " << dec << sizeof(Student::starosta) << endl << "Hex: " << endl;
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print_in_hex(&group[1].starosta, sizeof(Student::starosta));
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cout << endl << "Bin: " << endl;
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print_in_binary(&group[1].starosta, sizeof(Student::starosta));
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cout << endl;
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// все элементы массива в шестнадцатеричном виде
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for (size_t i = 0; i < 3; i++) {
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cout << "group[" << i << "]:" << endl;
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print_in_hex(&group[i], sizeof(Student));
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cout << endl;
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}
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return 0;
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}
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