Description: This is the lexical analysis process, lexical analysis of requirements: a simple lexical grammar: < keyword> -> main | int | char | string | while | do | if | else | for < identifier> -> L | < identifier> L | < identifier> D < integer> -> D | < integer> D < operator >->+|-|*|/|=|< |> |< =|> =|< > |= = < sector Fu> -> (|) | [|] | (|) the specific contents of the report
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词法源程序加报告
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