实现双向链表所存储线性表的各种操作。要求提供数据的插入、删除、查找、两个数据交换、求所有数据平均值、最大值、最小值的操作。先利用随机函数产生100个随机整数，建立线性表的存储结构，然后完成上述的功能。分析程序的时间、空间复杂度。-Achieve bi-directional linear list stored various operating table. Request for data insert, delete, search, both for data exchange, and all the data average, maximum, minimum operation. First using random functions to generate 100 random integers, set up the linear form of storage structure, then the completion of the above-mentioned functions. Analysis procedure time and space complexity.