Boost库-内存管理-智能指针-weak_ptr

#include<iostream>

#include<boost\weak_ptr.hpp>
#include<boost\shared_array.hpp>


int main(int argc, char** argv)
{
	boost::shared_ptr<int> sp0(new int(100));

	std::cout <<" sp0.use_count == " <<sp0.use_count()<< std::endl;

	boost::weak_ptr<int> wp0(sp0);

	std::cout << " wp0.use_count == " << wp0.use_count() << std::endl;

	if (!wp0.expired())
	{
		boost::shared_ptr<int> sp1 = wp0.lock();
		*sp1 = 111;

		std::cout << " wp0.use_count == " << wp0.use_count() << std::endl;
	}

	std::cout << " wp0.use_count == " << wp0.use_count() << std::endl;

	sp0.reset();

	std::cout << " wp0.use_count == " << wp0.use_count() << std::endl;


	return 0;
}

 

来源：CSDN

作者：莫忘输赢

链接：https://blog.csdn.net/wjl18270365476/article/details/104592996