智能指针1---AutoPtr

AutoPtr: 其主要思路是管理权的转移，当有新对象指向这块空间时，将原指针置空，实现管理权的转移。

#pragma once template<class T>class AutoPtr{public:AutoPtr():_ptr(NULL){}AutoPtr(T* ptr):_ptr(ptr){}//拷贝构造AutoPtr(const AutoPtr<T>& ap):_ptr(ap._ptr){ap._ptr = NULL;}//赋值运算符重载AutoPtr& operator=(AutoPtr<T>& ap){if (this != &ap){delete this->_ptr;this->_ptr = ap._ptr;ap._ptr = NULL;}return *this;}//析构函数~AutoPtr(){if (this->_ptr != NULL){delete _ptr;_ptr = NULL;}}//重载operator->T& operator->(){return  _ptr;}//重载operator*T* operator*(){return *_ptr;}protected:T* _ptr;};void TestAutoPtr(){AutoPtr<int> ap1(new int(1));AutoPtr<int> ap2;//ap2 = ap1;}