Fast C++ Bitwise Hamming Distance

hamming.cpp

#include <bitset>
#include <cassert>
#include <cstdint>
 
int main() {
	const uint64_t a = 3, b = 5;
	const size_t diff = a ^ b;
	std::bitset<64> diff_bits(diff);
	assert(diff_bits.count() == 2);
 
	return 0;
}