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first&follow源代码

于 2023-06-24 发布 文件大小:36.70 kB
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编译原理 1.    采用C或C++编写First和Follow函数,实现其求解过程。 (1)FIRST集合计算方法: ①      若Xàa.., 则将终结符a加入FIRST(X)中; ②      若Xàe,则将e加入FIRST(X)中; ③      若XàY…,且Y属于非终结符,则将FIRST(Y){e}加入到FIRST(X)中;(注:“”表示除去e元素,即FIRST(Y)中的非

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