struct Bits { union { std::uint8_t byte; struct { std::uint8_t b0:1, b1:1, b2:1, b3:1, b4:1, b5:1, b6:1, b7:1; }; }; }; int main(int argc, const char* argv[]) { Bits bits; bits.b0 = false; bits.b1 = true; std::cout << static_cast(bits.byte);

}