init

.gitignore

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+build/

.vscode/settings.json

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+{
+    "files.associations": {
+        "iostream": "cpp",
+        "ostream": "cpp",
+        "xstring": "cpp"
+    }
+}

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.15)
+
+project(cmake_template)
+
+set(CMAKE_CXX_STANDARD 17)
+
+add_subdirectory(source)

source/CMakeLists.txt

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+
+add_executable(cmake_template main.cpp)
+

source/main.cpp

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+#include <iostream>
+#include <string>
+
+auto to_hex = [](unsigned char c) -> char
+{
+    if (c < 10)
+    {
+        return c + 48;
+    }
+    else
+    {
+        return c + 55;
+    }
+};
+
+int main()
+{
+    unsigned char mac[6] = {0xa0, 0xa0, 0xb0, 0x03, 0xa0, 0xd0};
+    unsigned short sum = 0;
+
+    for (int i = 0; i < 6; i++)
+    {
+        sum += mac[i];
+    }
+    // print sum
+    std::cout << "Sum: " << sum << std::endl;
+    // to string
+    std::string macString = "";
+    // loop through all bytes
+    for (int i = 0; i < 6; i++)
+    {
+        // to HEX
+        macString += to_hex(mac[i] / 16);
+        macString += to_hex(mac[i] % 16);
+
+        // add colon
+        macString += ":";
+    }
+    // remove last colon
+    macString.pop_back();
+    // print mac address
+    std::cout << "MAC: " << macString << std::endl;
+
+    auto sum_to_hex = [](unsigned short s) -> std::string
+    {
+        std::string hex = "";
+        // loop through all bytes
+        for (int i = 0; i < 2; i++)
+        {
+            // to HEX
+            unsigned char c = s % 256;
+            hex += to_hex(c % 16);
+            hex += to_hex(c / 16);
+            // shift right
+            s /= 256;
+        }
+        // reverse string
+        std::reverse(hex.begin(), hex.end());
+        // return hex
+        return hex;
+    };
+
+    // print sum as hex
+    std::cout << "Sum as HEX: " << sum_to_hex(sum) << std::endl;
+}