输入一个正则表达式，输出相应的NFA图，NFA转换为DFA（得到的DFA图要求用画图方法完成并要求先产生子集构造表出来再画DFA图），DFA最小化（也要求用画图方法完成） -Enter a regular expression, the output corresponding NFA map, NFA is converted to DFA (the DFA plans to be asked to use drawing methods and called for the first

程序根据用户输入的dfa或者文件中的dfa，能最小化dfa，并根据最小化dfa来测试字符串-Program based on user input or file in dfa dfa, minimizes dfa, and according to the test string minimizing dfa