稀疏矩阵是指那些多数元素为零的矩阵。利用“稀疏”特点进行存储和计算可以大大节省存储空间，提高计算效率。实现一个能进行稀疏矩阵基本加减运算的运算器。

【基本要求】

稀疏矩阵的表示采用三元组，而运算结果的矩阵则以通常的阵列形式和三元组形式列出。

-Sparse matrix refers to those of most elements zero matrix. " Sparse"　characteristics of the storage and computing can greatly save storage space and improve computational efficiency. Achieve a sparse matrix subtraction operator. Requirements】 sparse matrix representation of triples, and the usual array of operational results matrix places the form and the form of triples listed.