Question

Dada la gramática siguiente en EBNF: < oración > ::= < A > < B >...

Dada la gramática siguiente en EBNF:

< oración > ::= < A > < B > < C >

< A > ::= a | a < A >

< B > ::= b | b < B >

< C > ::= c | c < C >

Indicate if the following sentences are syntactically corrected and why. Illustrate with parse tree.

aaBC

aacc

aabc

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Answer #1

1)

aaBC is syntactically correct because the following parse tree can be generated

2)

No parse tree can be generated for aacc, so it is not syntactically correct

3)

aabc is syntactically correct and the following syntax tree can be generated

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