Description: was a lexical analyzer here to start the definition of PASCAL language subset of the source points as lexical Analysis of the data entry process. The lexical analysis, the first since the paper began scanning source characters, Once found with "words" definition of the source string, it will be translated into fixed length of the internal word, check and fill the appropriate form. After lexical analysis, source string (source said external) has been translated into information such as a long string of words (source said the internal) , and produce two forms : Constant table and table identifier, namely contains the source of all the constants and all identifiers.
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