diff --git a/main.cpp b/main.cpp
index 96c342c..eb65a96 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,13 +1,101 @@
 
 // Created by Professional on 10.12.2025.
-
+#include <cstdio>
+#include <cstdint>
 #include <iostream>
 #include <vector>
+#include <cassert>
 using namespace std;
+
+char nibble_to_hex(uint8_t i){
+    assert(0x0 <= i && i <= 0xf);
+    switch (i) {
+        case 0x0: return '0';
+        case 0x1: return '1';
+        case 0x2: return '2';
+        case 0x3: return '3';
+        case 0x4: return '4';
+        case 0x5: return '5';
+        case 0x6: return '6';
+        case 0x7: return '7';
+        case 0x8: return '8';
+        case 0x9: return '9';
+        case 0xA: return 'A';
+        case 0xB: return 'B';
+        case 0xC: return 'C';
+        case 0xD: return 'D';
+        case 0xE: return 'E';
+        case 0xF: return 'F';
+        default:  return '?';
+    }
+
+}
+void print_in_hex(uint8_t byte) {
+    cout<< nibble_to_hex(byte >> 4)<<""<<nibble_to_hex(byte & 0x0F);
+}
+
+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]);      // байт в шестнадцатеричном виде
+        if ((i + 1) % 16 == 0) {
+            cout << '\n';
+        }
+        else {
+            cout << ' ';
+        }
+    }
+
+}
+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) {
+    const uint8_t* bytes = (const uint8_t*)data;
+    for (size_t i = 0; i < size; ++i) {
+        print_in_binary(bytes[i]);      // вывод по одному байту
+        printf(" ");                    // пробел между байтами
+        if ((i + 1) % 4 == 0)           // перевод строки после 4 байт
+            printf("\n");
+    }
+    if (size % 4 != 0)
+        printf("\n");
+
+}
+
+
+
 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);
+
+    cout<< endl;
+    printf("%02X", u8);
+
+
+
+
+    cout<< endl << "Enter number: ";
 
 
-    size_t number_count;
 
 
     return 0;