Using memory alignment to mount a 12-byte object with an int and unsigned long long

MemoryMagician.cpp

class MemorySpace {
public:
	void setSecond(long long second) {
		this->second_1 = second & 0x00000000ffffffff;
		this->second_2 = (second & 0xffffffff00000000) >> 32;
	}
	long long getSecond() {
		return this->second_1 + (((unsigned long long )this->second_2) << 32);
	}
private:
	int first;
	unsigned int second_1;
	unsigned int second_2;
	long long dummy;
};

int main() {
  MemorySpace ms1;
  // It is 18446744073709551375
	unsigned long long second = 0xffffffffffffff0f;
	ms1.setSecond(second);
  // Same 18446744073709551375, but this one is got from two unsigned int variables :)
	unsigned long long _second = ms1.getSecond();
}