说明：  该C程序是南京航天航天大学在读期间编写的有限元程序，分析了复杂梁杆单元受力下的变形，给出了每个节点的应力和应变
(The C program is the Space and Astronautics, Nanjing University of Reading during the preparation of the finite element program to analyze a complex truss beam under the force deformation, given the stress and strain for each node)