Find an error in a regular expression

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Reference no: EM131855223

Problem

1. How does the recursive-descent parser find an error in a regular expression such as (A+B)*BC+ which is incomplete?

2. Give the parse tree for the regular expression ((A+B)+(C+D)*)*.

3. Extend the arithmetic expression grammar to include exponentiation, division, and modulus operators.

Reference no: EM131855223

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