数据结构中稀疏矩阵的十字链表存取表示，加，减，乘，除等常用算法-data sparse matrix structure of the Cross access Chain said, plus or minus, by, among other commonly used algorithm

两个相同行数和列数的稀疏矩阵用十字链表实现加法运算-two identical rows and columns in the sparse matrix using Orthogonal List Adder Operational