用于计算一维问题的有限元源程序，为某一国外书籍的源程序（书名忘记），现将其调通，奉献给诸位。最要的是其程序结构和编程思想。用fortran77改编。-Used to calculate the one-dimensional finite element source, for a foreign source book (title forgotten), will now pass its tune, dedicated to you. The most important thing is