C++: compl

#include <bitset>
#include <iostream>

using bin = std::bitset<8>;

void show(bin z, const char* s, int n)
{
    if (n == 0) std::cout << "\n";
    if (n <= 2) std::cout << " "<<s<<"  " <<z<<" \n";
    if (n == 2) std::cout << "\n";
}

struct A
{
    compl A() { std::cout << "A dtor\n"; }
};

int main()
{
    bin x{"01011010"}; show(x, "x      ", 0);
    bin z = compl x;   show(z, "compl x", 2);
    A a;
}