1.概要

c++ 智能指针 交换函数实验
交换后，两个指针管理的目标对象会发生交换
sh_ptr1.swap(sh_ptr2);

2.代码

#include <iostream>
using namespace std;

int main()
{
    shared_ptr<int> sh_ptr1 = std::make_shared<int>(5);
    shared_ptr<int> sh_ptr2 = std::make_shared<int>(6);
    //交换前
    cout << "-- pre-switch ------------------------------------------\n";
    cout << "*sh_ptr1 == " << *sh_ptr1 << endl;
    cout << "*sh_ptr2 == " << *sh_ptr2 << endl;
    swap(sh_ptr1, sh_ptr2);
    //sh_ptr1.swap(sh_ptr2);
    //交换后
    cout << "-- After exchange ------------------------------------------\n";
    cout << "*sh_ptr1 == " << *sh_ptr1 << endl;
    cout << "*sh_ptr2 == " << *sh_ptr2 << endl;
    std::cout << "Hello World!\n";
}

3.运行结果

-- pre-switch ------------------------------------------
*sh_ptr1 == 5
*sh_ptr2 == 6
-- After exchange ------------------------------------------
*sh_ptr1 == 6
*sh_ptr2 == 5
Hello World!