add task3

task3.cpp

@@ -0,0 +1,131 @@
+#include <iostream>
+#include <cstddef>
+
+using namespace std;
+
+void print_in_hex(uint8_t byte)
+{
+    printf("%02X ", byte);
+}
+
+void print_in_hex(const void* data, size_t size)
+{
+    const uint8_t* bytes = (const uint8_t*)data;
+    for (size_t i = 0; i < size; i++)
+    {
+        print_in_hex(bytes[i]);
+        if ((i + 1) % 8 == 0)
+            printf("\n");
+    }
+    printf("\n");
+}
+
+void print_in_binary(uint8_t byte)
+{
+    for (int i = 7; i >= 0; i--)
+    {
+        printf("%d", (byte >> i) & 1);
+        if (i % 8 == 0)
+            printf(" ");
+    }
+}
+
+void print_in_binary(const void* data, size_t size)
+{
+    const uint8_t* bytes = (const uint8_t*)data;
+    for (size_t i = 0; i < size; ++i)
+    {
+        print_in_binary(bytes[i]);
+        if ((i + 1) % 8 == 0)
+            printf("\n");
+    }
+}
+
+#pragma pack(1)
+// Ñòðóêòóðà ñòóäåíòà
+struct Student 
+{
+    // Èìÿ
+    char _name[17];
+    // ãîä ïîñòóïëåíèÿ
+    uint16_t _year;
+    // ñðåäíèé áàëë
+    float _averageGrade;
+    // ïîë (0 — æåíñêèé, 1 — ìóæñêîé)
+    uint8_t _gender : 1;
+    // êîëè÷åñòâî ïðîéäåííûõ êóðñîâ
+    uint8_t _numCourses : 7;
+    // óêàçàòåëü íà ñòàðîñòó ãðóïïû
+    Student* _leader;
+};
+#pragma pack()
+
+int main() 
+{
+    setlocale(LC_ALL, "Russian");
+    Student students[3] = {0};
+
+    // Çàïîëíåíèå äàííûõ äëÿ ñòàðîñòû
+    strcpy(students[0]._name, "Îëüãà");
+    students[0]._year = 2020;
+    students[0]._averageGrade = 4.9f;
+    students[0]._gender = 0;
+    students[0]._numCourses = 7;
+    students[0]._leader = nullptr;
+
+    // Çàïîëíåíèå äàííûõ äëÿ âòîðîãî ñòóäåíòà
+    strcpy(students[1]._name, "Èâàí");
+    students[1]._year = 2020;
+    students[1]._averageGrade = 4.5f;
+    students[1]._gender = 1;
+    students[1]._numCourses = 5;
+    students[1]._leader = &students[0];
+
+    // Çàïîëíåíèå äàííûõ äëÿ òðåòüåãî ñòóäåíòà
+    strcpy(students[2]._name, "Äàíèë");
+    students[2]._year = 2021;
+    students[2]._averageGrade = 4.8f;
+    students[2]._gender = 1;
+    students[2]._numCourses = 6;
+    students[2]._leader = &students[0];
+
+    // Âûâîä àäðåñà è ðàçìåðà ìàññèâà
+    cout << "Àäðåñ ìàññèâà: " << &students << endl;
+    cout << "Ðàçìåð ìàññèâà: " << sizeof(students) << " áàéò" << endl;
+
+    // Âûâîä àäðåñîâ è ðàçìåðîâ âñåõ ýëåìåíòîâ ìàññèâà
+    for (int i = 0; i < 3; i++) 
+    {
+        cout << "Àäðåñ ýëåìåíòà " << i << ": " << &students[i] << endl;
+        cout << "Ðàçìåð ýëåìåíòà " << i << ": " << sizeof(students[i]) << " áàéò" << endl;
+    }
+
+    // Âûâîä èíôîðìàöèè î ïîëÿõ îäíîãî èç ýëåìåíòîâ ìàññèâà (íå ñòàðîñòû)
+    int index = 1;
+    Student& student = students[index];
+    cout << "Èíôîðìàöèÿ î ñòóäåíòå " << index << ":" << endl;
+    cout << "Çíà÷åíèå ïîëÿ _name: " << student._name << endl;
+    cout << "Àäðåñ ïîëÿ _name: " << &(student._name) << endl;
+    cout << "Ñìåùåíèå ïîëÿ _name îò íà÷àëà ñòðóêòóðû: " << offsetof(Student, _name) << " áàéò" << endl;
+    cout << "Ðàçìåð ïîëÿ _name: " << sizeof(student._name) << " áàéò" << endl;
+    cout << "Øåñòíàäöàòåðè÷íîå ïðåäñòàâëåíèå ïîëÿ _name:" << endl;
+    print_in_hex(student._name, sizeof(student._name));
+    cout << "Äâîè÷íîå ïðåäñòàâëåíèå ïîëÿ _name:" << endl;
+    print_in_binary(student._name, sizeof(student._name));
+    cout << endl;
+
+    cout << "Ýëåìåíòû ìàññèâà â øåñòíàäöàòåðè÷íîì âèäå:" << endl;
+    cout << "(Ïåðâûå " << sizeof(student._name) << " áàéò - ïîëå _name):" << endl;
+    cout << "(Äàëåå " << sizeof(student._year) << " áàéòà - ïîëå _year):" << endl;
+    cout << "(Äàëåå " << sizeof(student._averageGrade) << " áàéòà - ïîëå _averageGrade):" << endl;
+    cout << "(Äàëåå " << sizeof(uint8_t) << " áàéòà - 1 áèò äëÿ _gender è 7 áèò äëÿ _numCourses):" << endl;
+    cout << "(Äàëåå " << sizeof(student._leader) << " áàéòà - ïîëå _leader):" << endl;
+    for (int i = 0; i < 3; i++)
+    {
+        cout << "Ñòóäåíò ñ èíäåêñîì " << i << endl;
+        print_in_hex(&students[i], sizeof(students[i]));
+    }
+
+    system("pause");
+    return 0;
+}