五个Fortran程序，分别给出了三角方程组、高斯消去法、选主元消去法、Crout分解、Doolittle分解的程序源代码，给出了驱动函数，适于初学者学习-Five Fortran programs, respectively trigonometric group, Gaussian elimination, pivoting elimination, Crout decomposition, Doolittle, decomposition of the source code gives