constexpr2.cc

#define KEY 0x55

template <unsigned int N>
struct obfuscator {
    /*
     * m_data stores the obfuscated string.
     */
    char m_data[N] = {0};
  
    /*
     * Using constexpr ensures that the strings will be obfuscated in this
     * constructor function at compile time.
     */
    constexpr obfuscator(const char* data) {
        /*
         * Implement encryption algorithm here.
         * Here we have simple XOR algorithm.
         */
        for (unsigned int i = 0; i < N; i++) {
            m_data[i] = data[i] ^ KEY;
        }
    }
};

int main() {
    // Store "Hello" in obfuscated form using simple xor encryption.
    constexpr auto obfuscated_str = obfuscator<6>("Hello");
    return 0;
}