From f939cd26f5affe7af03bc9b816bd43079284944f Mon Sep 17 00:00:00 2001
From: MayorovAY <maiorovay@mpei.ru>
Date: Fri, 12 Dec 2025 17:42:30 +0300
Subject: [PATCH] =?UTF-8?q?=D1=87=D0=B0=D1=81=D1=82=D1=8C=202=20+=20=D1=87?=
 =?UTF-8?q?=D0=B0=D1=81=D1=82=D1=8C=203?=
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---
 main.cpp | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 59 insertions(+), 4 deletions(-)

diff --git a/main.cpp b/main.cpp
index e220f6e..8e4646a 100644
--- a/main.cpp
+++ b/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) {
@@ -73,10 +82,56 @@ void print_in_binary(const void* data, size_t size) {
 }
 
 int main() {
-    uint8_t u8 = 42;
-    uint16_t u16 = 1025;
-    uint32_t u32 = 1025;
+    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]
+    };
+
+    /* 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);
+
+    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): ");