Use raw pointers to access an object owned by a unique_ptr

raw_pointer_on_unique_ptr.cpp

#include <memory>
#include <iostream>

struct A {
	int x;
};

typedef std::unique_ptr<A> APtr;

int main() {
	A *a_ptr; 
	std::cout << (int)a_ptr << std::endl;
	{
		APtr a(new A);
		a_ptr = a.get();
		std::cout << (int)a_ptr << std::endl;
		a->x = 5;
		std::cout << a->x << " " << a_ptr->x << std::endl;
		a_ptr->x = 10;
		std::cout << a->x << " " << a_ptr->x << std::endl;
	}
	std::cout << (int)a_ptr << " " << (a_ptr == nullptr) << std::endl;
	return 0;
}