运用LU分解法来解线性方程组 可以改变N 来解N阶线性方程-N to solve N linear equations using LU decomposition method for solving linear equations can be changed

采用列主元高斯消去法求解线性方程组，可供初级学习参考使用，也可求解较复杂线性方程组。(The column principal element Gaussian elimination method is used to solve the linear equations, which can be used for primary learning reference and can solve the more complex linear equations.)