数据结构中关于十字链表的实现，十字链表可以很好的对稀疏矩阵进行效率很高的存储和计算。比如在通信纠错编码的ldpc编译码中就要用到这种数据结构-data structure on the realization of Chain Cross, Cross List can be good for sparse matrix highly efficient storage and computing. For example, in communications-correction coding