对于一个10乘10矩阵，先拟上三角化，再用带双步位移的QR方法求矩阵的特征值（包括复数特征值），再用列主元高斯消去法求矩阵的特征向量。-For a 10 by 10 matrix, first proposed on the triangulation, and then with a two-step displacement of the QR method, to calculate the eigenvalues ​ ​ of the matrix (includin