NFA的确定化是编译过程中一个重要的部分，由于本程序的输入很多，而且有多种格式的输入，所以输入时必须非常小心细致。本程序比较复杂，需要使用多个结构体并使用了指针。必须将程序分解为多个子程序以降低编写难度。想起了软工老师的一句话：＂难事破与易＂，再复杂的事，拆成一个个简单的小部分，逐个击破，在拼凑起来，复杂的事也变的简单了。适当使用全局常量可以控制有效控制内存溢出。由于程序较大，调试时多人协作能更容易易找出程序并成功修改。-NFA determination is the process of compiling an important part, due to the importation of many of the procedures, but also a variety of formats input, so input must be very careful and meticulous. This procedure is rather complicated, the need to use multiple structures and use the pointer. Procedures must be decomposed into a number of subroutines to reduce the difficulty of preparation. Soft workers thought of the teacher s words:　difficult to break and easy , and then a complex issue, is split into a small portion of a simple, one by one break in together, things have changed the complexity of the simple. Proper use of global constants can be controlled effectively control memory overflow. Because of the larger process, debugging collaboration when people can easily find out the procedure more easily and successfully modified.