часть 2 + часть 3

main.cpp

@@ -3,10 +3,19 @@
 #include <cstdio>
 #include <cstdint>
 #include <iostream>
-#include <vector>
+#include <cstddef>
 #include <cassert>
 using namespace std;
 
+struct Student {
+    char     name[17];        // имя + '\0'
+    uint16_t year;            // год поступления (2 байта)
+    float    gpa;             // средний балл
+    unsigned gender : 1;      // 1 бит: 0 — жен, 1 — муж
+    unsigned courses;         // количество курсов (обычное целое)
+    struct Student* headman;  // указатель на старосту
+};
+
 char nibble_to_hex(uint8_t i){
     assert(0x0 <= i && i <= 0xf);
     switch (i) {
@@ -47,11 +56,16 @@ void print_in_hex(const void* data, size_t size) {
     }
 
 }
+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) {
         printf("%d", (byte >> bit) & 1);
     }
-    cout<< endl;
 }
 
 void print_in_binary(const void* data, size_t size) {
@@ -67,37 +81,95 @@ void print_in_binary(const void* data, size_t size) {
 
 }
 
-
-
 int main() {
-    uint8_t u8 = 0x42;
-    uint16_t u16 = 0x42;
-    uint32_t u32 = 0x42;
-    print_in_hex(u8);
-    cout<<" ";
-    cout<< endl;
-    cout << "u8 bytes: ";
-    print_in_hex(&u8, sizeof(u8));
-    cout<< endl;
-    cout << "u16 bytes: ";
-    print_in_hex(&u16, sizeof(u16));
-    cout<< endl;
-    cout << "u32 bytes: ";
-    print_in_hex(&u32, sizeof(u32));
-    cout << '\n';
-    print_in_hex(&u8,40);
+    struct Student group[3] = {
+            { "Ivanov", 2023, 4.5f, 1, 10, NULL },   // [0] староста
+            { "Petrova", 2023, 4.2f, 0, 8,  &group[0] }, // [1]
+            { "Sidorov", 2023, 3.9f, 1, 6,  &group[0] }  // [2]
+    };
 
-    cout<< endl;
-    printf("%02X", u8);
+    /* 1) Адрес и размер массива */
+    printf("group address = %p, sizeof(group) = %zu\n",
+           (void*)group, sizeof(group));
 
+    /* 2) Адреса и размеры элементов массива */
+    for (int i = 0; i < 3; ++i) {
+        printf("group[%d]: address = %p, sizeof = %zu\n",
+               i, (void*)&group[i], sizeof group[i]);
+    }
 
+    /* 3) Информация по полям (пример для group[1], не староста) */
+    struct Student *s = &group[1];
+    printf("\nField name:    addr=%p, offset=%zu, size=%zu\n",
+           (void*)&s->name, offsetof(struct Student, name),
+           sizeof s->name);
 
+    printf("Field year:    addr=%p, offset=%zu, size=%zu\n",
+           (void*)&s->year, offsetof(struct Student, year),
+           sizeof s->year);
 
-    cout<< endl << "Enter number: ";
-
+    printf("Field gpa:     addr=%p, offset=%zu, size=%zu\n",
+           (void*)&s->gpa, offsetof(struct Student, gpa),
+           sizeof s->gpa);
 
+    printf("Field courses: addr=%p, offset=%zu, size=%zu\n",
+           (void*)&s->courses, offsetof(struct Student, courses),
+           sizeof s->courses);
 
+    printf("Field headman: addr=%p, offset=%zu, size=%zu\n",
+           (void*)&s->headman, offsetof(struct Student, headman),
+           sizeof s->headman);
+    printf("Field name hex:\n");
+    print_in_hex(&group[1], sizeof group[1]);
+    printf("\nField year hex: ");
+    print_in_hex(&s->year, sizeof s->year);
+    printf("\nField gpa hex: ");
+    print_in_hex(&s->gpa, sizeof s->gpa);
+    printf("Field name bin:\n");
+    print_in_binary(&group[1], sizeof group[1]);
+    printf("Field year bin: ");
+    print_in_binary(&s->year, sizeof s->year);
+    printf("Field gpa bin: ");
+    print_in_binary(&s->gpa, sizeof s->gpa);
+    cout<<endl;
+    uint16_t a, b, result;
+    char op;
+    printf("Enter the first operand (0..65535): ");
+    cin >> a;
+    printf("Enter the operator (&, | or ^):");
+    cin >> op;
+    printf("Enter the second operand (0..65535): ");
+    cin >> b;
+    switch (op) {
+        case '&':
+            result = a & b;
+            break;
+        case '|':
+            result = a | b;
+            break;
+        case '^':
+            result = a ^ b;
+            break;
+        default:
+            cout << "Unknown operator: " << op << endl;
+            return 1;
+    }
 
+    printf("\nResult of the operation %hu %c %hu:\n", a, op, b);
+    printf("Hex: ");
+    print_in_hex(&a, sizeof(a));
+    printf(" %c ", op);
+    print_in_hex(&b, sizeof(b));
+    printf(" = ");
+    print_in_hex(&result, sizeof(result));
+    printf("\n");
+    printf("Bin: ");
+    print_in_binary(&a, sizeof(a));
+    printf("   %c ", op);
+    print_in_binary(&b, sizeof(b));
+    printf("   = ");
+    print_in_binary(&result, sizeof(result));
+    printf("\n");
     return 0;
 }
 //test23234