reverse_byte.cpp

// ReverseByte.cpp

uint8_t reverse_byte(uint8_t b){
    unsigned int v = b;
    unsigned int r = v;
    int s = sizeof(b) * CHAR_BIT - 1;

    for(v>>=1;v;v>>=1){
        r <<= 1;
        r |= v&1;
        s--;
    }
    r <<= s;
    return r;
}


int main(){
    auto ik = 0x0F;
    auto ki = reverse_byte(ik);
    std::cout << std::hex <<(int)ki <<"\n";
    return 0;
}