leichaowen的博客

#includeusing namespace std;class U_Ptr{friend class HasPtr;int *ip;size_t use;U_Ptr(int *p) :ip(p), use(1){cout }~U_Ptr(){delete ip;cout }};class Has

shared_ptr 的问题

template<class T> class enable_shared_from_this{protected: enable_shared_from_this() { } enable_shared_from_this(enable_shared_from_this const &) { } enable_shared_from_this