4- Let us consider the following grammar with the given production rules: E-> I E-> E+E E-> E* E E-> (E) I->e|0|1 ... 9 Provide 2 different ways in which the string 3*4+8 can be derived from the above grammar.
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- A) Write a BNF grammar for the language consisting of strings built only of the letters a and b. The strings may have any number of these letters, but the letter combinations bb must be in each string somewhere, and each string must start with a aa. For example, the strings aaabbabbba, aaaababba, and aababbabb are in the language, while a, bba, ababb, aabaa, and bbaa are not. B) Draw the parse tree for string aabbaaba according to the previous grammar: C) Describe, in complete English sentences and “layman’s terms,” the language defined by the following grammar in BNF (start symbol is <S>):<S> ::= <A>a | <B>b<C> ::= c<A> ::= a<A>a | <C><B> ::= b<B>b | <C>: Consider the following Operator Grammar: E -> E + E | E* E | (E) | id Show the actions of Operator Precedence Parser on the input (id + id * id) + id $1. Use the algorithm described in class that takes a CFG and converts it into a CNF (Chomsky Normal Form) grammar that generates the same language as the original grammar, except possibly for the string A, to answer the following question. As part of your answer, you should say which variables are nullable, and you should give the appropriate grammar after each step of the algorithm. There are four steps. Give a CFG (context-free grammar) in CNF (Chomsky Normal Form) that generates the same language, except possibly for the string A, as the following grammar: SAB AB →bAa A → aaB bb
- Principles of programming languages: Write the BNF grammar for assignment statements written with any of the operators listed in the table below giving their precedence and associativity. The start symbol for the grammar is ASSIGN. Use the tokens ident and numlit wherever an identifier or numerical literal occurs in the appropriate rule. Note: Write your nonterminal symbols in all upper case letters. Don't use < and > in your answer since it causes problems with typing your answer. Precedence Operator Type Associativity 5 ( ) Parenthesis Left to Right 4 ! Unary logical negation Right to Left 3 == is equal to Left to Right 2 && Logical AND Left to Right 1 = %= Assignment Modulus assignment Right to LeftConsider the following grammar: S➞ ACB/CbB/BaA➞ da/BCB➞ g/∈C➞ h/∈ What is the follow of B?Q1: Write a grammar for the language that includes all strings containing n copies of alphabet a, followed by n+1 copies of the alphabet b. Assume ? > 0. Upon completion of the grammar definition, draw the parse tree for the sentences abb and aabbb along with the derivations.Q2: Consider the identifier definition of a hypothetical programming as follows: strings of consist of letters and numbers, and they must begin with a letter.
- Problem 1: Write a regular expression that recognizes the following language over the alphabet {a,b}: Any string containing the letters a and b, where the number of letters is not a multiple of three. (Note that 0 is a multiple of three.) Your regular expression should contain only a and b, and the metacharacters (, ), *, +, ? and |. Problem 2: Write a context free grammar that recognizes language from Problem 1. Your start symbol should be named S.c) Define predictive parsing. Consider the following grammar: type → simple | Tid array [simple] of type simple → integer | char num dotdot num Write down the pseudo-code for the predictive parser that validates an input string which follows the syntax of the above grammar.G(E):E->E + T | T T->T*F | FF->(E) | digitConstruct a parser for grammar E by YACC-BISON, compute the value,and print the result.Design the attribute grammar: + and * operator can only be used for integers,else errors should be reported. code should be submitted as well. Please add explanation. PLEASE DONT COPY AND PASTE THE OTHER SOLUTION ON CHEGG BECAUSE IT ISNT THE FULL ANSWER
- a. Write a BNF grammar for the language consisting of strings built only of the letters a and b. The strings may have any number of these letters, but the letter combinations bb must be in each string somewhere, and each string must start with a aa. For example, the strings aaabbabbba, aaaababba, and aababbabb are in the language, while a, bba, ababb, aabaa, and bbaa are not. b. Draw the parse tree for string aabbaaba according to the previous grammar: c. Describe, in complete English sentences and “layman’s terms,” the language defined by the following grammar in BNF (start symbol is <S> ): <S>::= <A>a|<B>b <C>::= c <A>::= a<A>a|<C> <B>::= b<B>b|<C>Topic: Compiler Construction Syntax Analysis Show that the grammarA → −AA → A − idA → idis ambiguous by finding a string that has two different syntax trees.Now make two different unambiguous grammars for the same language:a) One where prefix minus binds stronger than infix minus.b) One where infix minus binds stronger than prefix minus.Show the syntax trees using the new grammars for the string you used to prove theoriginal grammar ambiguous.d) Construct a type-3 grammar that derives the L₂ language. (You can use the A- intransitive diagram you found in b.) 5. Let the G, grammar be defined as follows: QILIAH Блязадоля до УТИБАЯ TO G₁VN,VT.P.S> UDAL VN: (S, A, B, CADA ESOSESOE VT: (0,1) P: SOS | 1A A OBAM B➡ OB | 15 | 1 H odmuinsbur2. a) What type of grammar is G₁? b) Construct the FA (finite automaton) model that recognizes the language derived from this grammar and draw the transition diagram.. HOITUD