auto_ptrs指针转移拥有权的行为

#include "stdafx.h"#include <iostream>#include <memory>using namespace std;template <class T>ostream& operator<< (ostream &strm, const auto_ptr<T>& p){if (p.get() == NULL){strm << "NULL";} else{strm << *p;}return strm;}int main(){auto_ptr<int> p(new int(42));auto_ptr<int> q;cout << "After the Initialized :" << endl;cout << "p: " << p << endl;cout << "q: " << q << endl;q = p;cout << "After assigned the auto pointers :" << endl;cout << "p: " << p << endl;cout << "q: " << q << endl;*q += 13;p = q;cout << "After the changed and reassignment :" << endl;cout << "p: " << p << endl;cout << "q: " << q << endl;return 0;}