输入并建立两个稀疏矩阵A和B的十字链表, 输出稀疏矩阵, 两完成两稀疏矩阵的加法运算,结果存放在稀疏矩阵A中, 要求相加结果为0的元素从结果稀疏矩阵的十字链表中删除, 输出A稀疏矩阵-Input and the establishment of two sparse matrices A and B, cross linked, the output matrix, the two completed the addition of two sparse matrix computation,