语法分析关于first集和follow集。可运行可使用。自己看吧。没问题的。 还有不知为什么不能归为源码一栏 那个谁谁有空看下-Grammar analysis of first set and follow sets. Can be used to run. Check it out themselves. No problem. I do not know why there should not fall into one column that source availability谁谁