diff --git a/lab04/main.cpp b/lab04/main.cpp
index 2863d8b..12d3a44 100644
--- a/lab04/main.cpp
+++ b/lab04/main.cpp
@@ -51,60 +51,68 @@ bit_digit(uint8_t byte, uint8_t bit) {
     return '0';
 }
 
-void
-print_in_binary(uint8_t byte) {
+#include <iostream>
+#include <cassert>
+#include <iomanip>
+
+using namespace std;
+
+// ... (остальные функции из предыдущего кода остаются без изменений)
+
+void print_in_binary(uint8_t byte) {
     for (int bit = 7; bit >= 0; bit--) {
         cout << bit_digit(byte, bit);
     }
 }
 
+void print_in_binary(const void* data, size_t size) {
+    const uint8_t* bytes = static_cast<const uint8_t*>(data);
 
-int main()
-{
+    // Печатаем байты в обратном порядке для правильного отображения чисел
+    for (int i = size - 1; i >= 0; i--) {
+        print_in_binary(bytes[i]);
+
+        // Разделители для удобства чтения
+        if (i > 0) {
+            if (i % 4 == 0)
+                cout << "\n";
+            else
+                cout << " ";
+        }
+    }
+}
+
+int main() {
+    // Тестирование чисел из лекционного слайда
+    uint16_t a = 0x4d2;    // 1234 в десятичной
+    uint16_t b = 0x1234;   // 4660 в десятичной
+
+    cout << "0x4d2 (1234) in binary:\n";
+    print_in_binary(&a, sizeof(a));
+    cout << "\n\n";
+
+    cout << "0x1234 (4660) in binary:\n";
+    print_in_binary(&b, sizeof(b));
+    cout << "\n\n";
+
+    // Пример с арифметическими операциями
+    uint16_t sum = a + b;
+    uint16_t diff = b - a;
+    uint16_t xorr = a ^ b;
+
+    cout << "Sum (0x4d2 + 0x1234):\n";
+    print_in_binary(&sum, sizeof(sum));
+    cout << "\n\n";
+
+    cout << "Difference (0x1234 - 0x4d2):\n";
+    print_in_binary(&diff, sizeof(diff));
+    cout << "\n\n";
 
-    assert(nibble_to_hex(0x0) == '0');
-    assert(nibble_to_hex(0x1) == '1');
-    assert(nibble_to_hex(0x2) == '2');
-    assert(nibble_to_hex(0x3) == '3');
-    assert(nibble_to_hex(0x4) == '4');
-    assert(nibble_to_hex(0x5) == '5');
-    assert(nibble_to_hex(0x6) == '6');
-    assert(nibble_to_hex(0x7) == '7');
-    assert(nibble_to_hex(0x8) == '8');
-    assert(nibble_to_hex(0x9) == '9');
-    assert(nibble_to_hex(0xa) == 'a');
-    assert(nibble_to_hex(0xb) == 'b');
-    assert(nibble_to_hex(0xc) == 'c');
-    assert(nibble_to_hex(0xd) == 'd');
-    assert(nibble_to_hex(0xe) == 'e');
-    assert(nibble_to_hex(0xf) == 'f');
-
-    uint8_t byte = 0xff;
-
-    uint8_t u8 = 0x42;
-    cout << "u8 bytes: ";
-    print_in_hex(&u8, sizeof(u8));
-    cout << '\n';
-
-    uint16_t u16 = 0x42;
-    cout << "u16 bytes: ";
-    print_in_hex(&u16, sizeof(u16));
-    cout << '\n';
-
-    uint32_t u32 = 0x42;
-    cout << "u32 bytes: ";
-    print_in_hex(&u32, sizeof(u32));
-    cout << '\n';
-
-
-    cout << "0x" << hex << static_cast<int>(byte) << " hex: ";
-    print_in_hex(&byte, sizeof(byte));
-    cout << "0x" << hex << static_cast<int>(byte) << " bin: ";
-    print_in_binary(byte);
+    cout << "XOR (0x4d2 ^ 0x1234):\n";
+    print_in_binary(&xorr, sizeof(xorr));
     cout << "\n\n";
 
 
-    cout << "Press any key for exit... ";
     cin.ignore();
     return 0;
 }