松弛法进行迭代，求解方程组的解。先输入矩阵维数、迭代最高次数、松弛因子、误差范围，然后输入系数矩阵、长数矩阵，程序自动根据松弛法进行迭代求解。-Iterative relaxation method, to solve equations. Input matrix dimension, the maximum number of iterations, relaxation factor, error range, then enter the coefficient matrix, long