能够完成正规式到NFA的转换，NFA到DFA的转换（子集法）,DFA的最小化，测试一个生成串是否能为生成的DFA所识别-to complete the formal ceremony to change the NFA, NFA conversion to DFA (subset), the smallest of DFA, testing whether a string of generation to generation by the DFA Recognition

实现NFA到DFA的转换，是编译原理初学者比较好的参考资料-Achieve NFA to DFA conversion, the principle is to compile a better reference for beginners

user enter one dfa or nfa and program check this automat is nfa or dfa