本程序用带双步位移的QR分解法求一给定矩阵的全部特征值，并对其中的每一个实特征值求相应的特征向量，给出算法的设计方案和全部源程序，计算并输出如下内容：（1）矩阵经过拟上三角化后所得的矩阵；（2）对矩阵进行QR分解后所得的矩阵Q、R和RQ；（3）矩阵的全部特征值；（4）矩阵的相应于实特征值的特征向量。-The program uses two-step displacement with QR decomposition method find all the characteristics of a given matrix value, and each of them find the corresponding real eigenvalue eigenvector algorithm design is given and all source code, calculate and the following: (1) matrix through the post to be obtained on the triangular matrix　(2) of the matrix from QR decomposition of the matrix Q, R, and RQ　(3) the value of all the characteristics of the matrix　(4) the corresponding matrix the real eigenvalue eigenvectors.