程序使用高斯消去法实现导纳矩阵形成阻抗矩阵（即求逆）运算。采用带行辅助向量的三元组表来存储由给定文件中各支路参数形成的节点及导纳数据，其中三元组中导纳类型为复数类。可以通过查找函数结合辅助向量实现对指定行列的元素的查找和输出。-The program uses the Gaussian elimination method to achieve admittance matrix to form the impedance matrix (inverse) operator. With adjuvant vector triples table storage is satisfied by the node and guide the formation of each branch parameter in the given file data, which triples the admittance type of complex class. Can be combined with auxiliary vector through the search function to find and output elements of the specified ranks.