Vector series--vector<unique_ptr<>> initialization in combat C + + (ownership transfer)

C++11 provides us with smart pointers, which brings us a lot of convenience.

So what if the unique_ptr is the element of a vector container?

form the same:vector<unique_ptr<int> > vec;

But how do you add elements to VEC?

See below:

#include<iostream>#include<vector>#include <memory>usingnamespacestd;int main(){    vector<unique_ptr<int>> vec;    vec.push_back(1);//错误    return0;}

First define a unique_ptr and then Push_back ():

#include<iostream>#include<vector>#include <memory>usingnamespacestd;int main(){    vector<unique_ptr<int>> vec;    unique_ptr<int> sp(newint(126));    vec.push_back(sp);//尝试引用已删除的函数    return0;}

This is the ownership of the unique smart pointer, which requires the use of Std::move:

#include <iostream>#include <vector>#include <memory>using namespace STD;intMain () { vector<unique_ptr<int>> VEC; unique_ptr<int> Sp (New int(126));//vec.push_back (1);Vec.push_back (STD:: Move (sp));//Try referencing a deleted function    cout<< *vec[0]<< Endl;//Output 126    //cout << *sp << Endl;    return 0;}

But at this point, what does the SP of the above code program do? Using the * value to see the results of the program crashes, why?
This is where the SP has been released and ownership has shifted!

Vector series--vector<unique_ptr<>> initialization in combat C + + (ownership transfer)