大整数加法 我们将一个大整数从右到左分组，每三位为一个节点，若剩余一个组不满三位也将其作为一个节点处理。大整数本身的符号用头节点来表示。1表示正数，-1表示负数。通过这样的方式我们就构造了一个存储大整数的双向链表，然后就可以进行大整数的基本运算了。-Large integer addition we will be a large integer division from right to left, each for a three-node, if a group dissatisfied with the remaining three will also be dealt with as a node. Large integer own symbols to indicate the head node. 1 that the positive, negative-1 said. Through the way we construct a two-way store large integer list, and then be able to carry out the basic operations of integers.