output.txt

用VC实现的词法分析器

Grammar Tree:

{Grammar}
 [Null]
  ->Integer
   [Value]
  ->Value
   [Expression]
  ->Expression
   [Null]
    ->Operator
     [Null]
      ->Expression
       [Expression]
    ->EndOfFile
     [Input]
  ->OpenParenthesis
   [Null]
    ->Expression
     [Null]
      ->CloseParenthesis
       [Expression]
  ->PlusSign
   [Operator]

Parsing Tokens:

[Integer - Line #1 (Token = "1")]
[EndOfFile - Line #1]

Parsing Expression:


Result:

[Input - Line #1]
 [Expression - Line #1]
  [Value - Line #1]
   [Integer - Line #1 (Token = "1")]
 [EndOfFile - Line #1]