Description: Here to begin the definition of a subset of the PASCAL language source program as a lexical analysis of input data. In lexical analysis, since the beginning of the first scan source document characters, once in line with the " word" when the definition of the source string to translate it into fixed-length internal word said, and check the appropriate information sheet to fill. After lexical analysis, the source string (the external source said) has been translated into words, such as long strings of information (the internal source said), and two forms: constant table and the identifier table, which contain, respectively, the source of all the constants and all identifiers.
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词法分析的C实现（做编译器的时候很有用）.txt
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