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3. Why does the code print a value of 2? How many std :: vector instances will occur? c++

3. Why does the code print a value of 2? How many std :: vector instances will occur? c++

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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3. Why does the code print a value of 2? How many std :: vector <int> instances will occur? c++ 1 #include <vector> 2 #include <memory> 3 #include <iostream> 45 class Token { 6 private: 7 std:shared_ptr<std:vector<int> > ptr = std:make_shared<std:vector<int> >(); 8 public: 9 Token() = default; 10 Token(Token&& to) noexcept { ptr = t0.ptr; } 11 auto getPtr() { return ptr; } 12 }; 13 14 int main() { 15 Token t = Token(); 16 std:cout << t.getPtr().use_count(); 17 18 return 0; 19 } Need clear explanation within 20 min correct answer will get like
Transcribed Image Text:3. Why does the code print a value of 2? How many std :: vector <int> instances will occur? c++ 1 #include <vector> 2 #include <memory> 3 #include <iostream> 45 class Token { 6 private: 7 std:shared_ptr<std:vector<int> > ptr = std:make_shared<std:vector<int> >(); 8 public: 9 Token() = default; 10 Token(Token&& to) noexcept { ptr = t0.ptr; } 11 auto getPtr() { return ptr; } 12 }; 13 14 int main() { 15 Token t = Token(); 16 std:cout << t.getPtr().use_count(); 17 18 return 0; 19 } Need clear explanation within 20 min correct answer will get like
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