shared_pointers.cpp
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	#include <iostream>
	#include <memory>

	std::shared_ptr<double> get_vector(int n) {
	return std::shared_ptr<double>(new double[n]);
	}

	int main() {

	std::shared_ptr<double> ptr1 = get_vector(10);
	std::shared_ptr<double> ptr2 = ptr1;

	// memory of pointer freed when ptr1 and ptr2 are out of scope
	}