diff --git a/lab04/main.cpp b/lab04/main.cpp
index f38e88f..048e98a 100644
--- a/lab04/main.cpp
+++ b/lab04/main.cpp
@@ -17,6 +17,33 @@ cout << nibble_to_hex(byte >> 4)
     << endl;
 }
 
+const uint8_t* as_bytes(const void* data);
+
+void print_in_hex(const void* data, size_t size)
+{
+    const uint8_t* bytes = as_bytes(data);
+    for (size_t i = 0; i < size; i++)
+        {
+            print_in_hex(bytes[i]);
+
+            if ((i + 1) % 16 == 0)
+            {
+                cout << '\n';
+            }
+            else
+            {
+                cout << ' ';
+            }
+        }
+}
+
+const uint8_t* as_bytes(const void* data)
+{
+    return reinterpret_cast<const uint8_t*>(data);
+}
+
+
+
 int main()
 {
 
@@ -37,9 +64,25 @@ int main()
     assert(nibble_to_hex(0xe) == 'e');
     assert(nibble_to_hex(0xf) == 'f');
 
-    uint8_t byte = 0xce;
+    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';
+
 
-    print_in_hex(byte);
+    //print_in_hex(byte);
 
 
     cout << "Press any key for exit... ";