auto_ptr

#pragma once// 简单实现自动释放智能指针// ps：分析以后可以发现AutoPtr拷贝对象时有非常大的缺陷，拷贝后会留下空智能指针对象的隐患template <class T>class AutoPtr{public:AutoPtr(T * ptr = NULL):_ptr(ptr ){}~ AutoPtr(){if (_ptr ){delete _ptr ;}}AutoPtr(AutoPtr<T>& ap): _ptr(ap ._ptr){ap._ptr = 0;}AutoPtr& operator=(AutoPtr<T>& ap){if (this != &ap){_ptr = ap ._ptr;ap._ptr = 0;}return *this ;}T* GetPtr(){return _ptr;}T& operator * (){return *_ptr ;}T* operator -> (){return _ptr ;}private:T* _ptr ;};void TestAutoPtr(){AutoPtr<int> p1 = new int (10);AutoPtr<int> p2 = p1;AutoPtr<int> p3;p3 = p2 ;// AutoPtr的缺陷//*p1 = 4;}