编译原理-词法语法分析器
compile2.cpp(词法分析) 应在D:\test.txt的位置放入待测代码(代码中读取路径是D盘根目录下) 运行后会在D:\token.txt中生成token序列 运行compile2.exe
compile3.cpp(输出first和follow集) 应在D:\first.txt放入文法 然后会在终端输出两个集合，可以自行保存 (压缩包中的first_ans和follow_ans就是生成后的两个集合，也应放在D盘根目录下再进行预测分析) 运行compile3.exe
predict.cpp(预测分析) 分别在D:\first_ans和D:\follow_ans存入生成完毕的两种集合 并从D:\token中读入token序列 预测分析表会生成在D:\table.txt中(代码中已将这部分注释掉，存起来只是个心理安慰) 最后终端打印LL(1)的产生式序列 运行predict.exe
ps：建议把所有的txt都存到D盘根目录下
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