编译原理实验2-递归下降分析–表达式求值
http://blog.csdn.net/xuzengqiang/article/details/7596357这是源地址,个人并没有做太大改动,于是就不写原创。写编译原理实验的时候,当写到Expression->Term|Expression+Term|Expression-Term Term->Factor|Term*Factor|Term/Factor