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There are two restrictions on the type of grammars that can be used with a recursive descent parser.
The first is that the grammar cannot have any left recursive productions. Give an example of a left recursive production and explain why such productions would be a problem.
The second restriction is that the grammar must not require more than one token look ahead.
Give an example of a production that does not have this property. Explain why this restriction is necessary for recursive descent parsing.
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Write a program that reads the file rc.txt and uses the data to calculate the rise time. Approximate B by the voltage in the last line of the file.
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