一、问题描述

设计一个实现任意长的整数进行加法运算的演示程序。

二、需求分析

（1）利用双向循环链表实现长整数的存储，每个结点含一个整形变量，任何整形变量的范围是-(215-1) ~ (215-1)。输入和输出形式：按中国对于长整数的表示习惯，每四位一组，组间用逗号隔开。-a problem describe the design to achieve an arbitrarily long integer addition operations for the demonstration program. Two, demand analysis (1) using two-way cycle Chain achieve long integer storage, each node containing a plastic variables, any plastic scope of the variables - (215-1) ~ (215-1). Input and output forms : by China for the long integer said habits, a group of four, the group separated by a comma.