2. Given is the following BNF grammar: < comp op > ''<' I ''<-'' I 'ל''...
Q3. Convert the following recursive BNF grammar to EBNF: (20%) <assign>-> <id> = <expr> <expr> -> <d>+ <expr> | <id> * <expr> 1 (<expr>) | <i>
Show that this grammar is ambiguous for the string a+b+c: <S> - <x> <X> - <x>+ <x> <X> - <id> <id> - abc Give the derivations.
Question 1 Consider the following BNF grammar: Not complete Marked out of 3.00 p Flag question <letter> ::= "a" | "b" | "C" | "d" | "e" | "F" | "g" | "h" | "1" ";" | "K" | "1" | "m" | "n" | "0" | "p" | "q" | "r" | "S" | "t" || "u" | "V" | "W" | "x" | "y" | "z" <digit> ::= "O" | "1" | "2" | "3" | "4" |...
Considering the following BNF grammar, answer the questions. <prog> - <assign> | <expr> <assign> = <id> = <expr> <expr> := <expr> + <term> | <expr> - <term> | <term> <term> := <factor> | <factor> * <term> <factor> ::= ( <expr> ) | <id> | <num> <id>::= ABC <num> := 0|1|2|3 2a - What is the associativity of the * operator? (5 points) 2b - For the * and + operators, do they have the same precedence, does the * operator...
Question Set 2 1. Given the following grammar dactor>-> ( <expr> ) a) What is the associativity of each of the operators? What is precedence of the operators? Show a leftmost derivation and parse tree for the following sentence: b) c) A-A(B(C A)) d) Rewrite the BNF grammar above to give precedence over and force to be right associative.
Question Set 2 1. Given the following grammar dactor>-> ( <expr> ) a) What is the associativity of each of the operators? What is precedence of the operators? Show a leftmost derivation and parse tree for the following sentence: b) c) A-A(B(C A)) d) Rewrite the BNF grammar above to give precedence over and force to be right associative.
1. Consider the following BNF definition of arithmetic expressions: <expression> <expression>+ <term> | <expression>-<term> <term> <term> ::= <term>*<factor> <term>/<factor> | <factor> <factor> :: <digit>«<exponent> | <didgit>^«<exponent> <digit>(<expression> <digit>:= 01|2|3|4151617181910. <exponent> :: <sign> <val> <sign>=+1 - <val 1121314 Draw the expression trees of the following expressions, parsed according to the BNF above. a) 46 - 6/4-243. b) 4*6 -(6/4 - 243) c) 31-2-3*2 + 3/2 d) 3^2*5. e) ((3^2)).
Construct a context-free grammar for the language L={ab'ab'an> 1}.
please provide good explanation.
Consider the following grammar for variable and class
declarations in Java:
<Decl> -> <VarDecl>
| <ClassDecl>
<VarDecl> -> <Modifiers> <Type> <VarDec> SEM
<ClassDecl> -> <Modifiers> CLASS ID LBRACE <DeclList> RBRACE
<DeclList> -> <Decl>
| <DeclList> <Decl>
<VarDec> -> ID
| ID ASSIGN <Exp>
| <VarDec> COMMA ID
| <VarDec> COMMA ID ASSIGN <Exp>
Indicate any problems in this grammar that prevent it from being
parsed by a recursive-descent parser with one token lookahead. You
can simply...
3. Consider the following BNF for arithmetic expressions: <expression> ::= <term> <term>+ <expression> | <term> - <expression> <term> ::= <factor> | <factor> * <term> | <factor> I <term> <factor> ::= <constant> (<expression>) <constant ::= 0|1|2|3|4|5|6789 a) Show the expression tree of the following expression: 8/7*5/6-6/4/2-7*(5+2). b) Give the value of this expression. c) Same question as (a), if the BNF were <expression> ::= <term> | <expression>+ <term> | <expression> - <term> <term> ::= <factor> | <term>*<factor> | <term> / <factor>...