完成一个程序实现双向链表使之有如下功能

(如用C++实现，需要有默认的构造函数, 析构函数)

C语言实现，初始化一个双向链表

添加一个元素到链表

删除链表中的一个元素

其他你认为必要的链表操作

总有两个指针,一个指向表中第一个元素另一个指向最后一个元素

-Completion of a program to achieve a two-way linked list so that the following functions (such as C++ Realized the need for the default constructor, destructor) C language, to initialize a two-way linked list to add an element to the list to delete a list of other elements in the list do you think is necessary to operate a total of two indicators, a point to form the first element to another point to the last element