自定义的智能指针类，可是多个指针共用对象，且不会造成内存泄露的问题-since the definition of smart pointer types, but a number of indicators shared object, and it will not disclose the cause memory problems

这是一个很好的帮助类，在适用STL的容器的时候，可以配合for_each算法函数删除容器中的指针对象-This is a very good help category, where applicable, the STL containers, they can function with the for_each algorithm to delete the pointer container object