Describe the concept of the abstract syntax tree (AST), and solve the following statement: for(a=10; a< 100; a+5) Print a;
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Describe the concept of the abstract syntax tree (AST), and solve the following statement:
for(a=10 ; a < 100 ; a+5) Print a;
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- Recursive Descent subprogram with EBNF rule, using C or Java syntax (syntax) Type (Recursive-Descent Subprogram): -> while () ; The lex method to be used reads a single lexeme, and the lexemes' token code is in the nextToken variable is to the left. Suppose that the defined tokens are respectively: while - WHILE_CODE left parantex - LEFTPAREN_CODE right parenthesis - RIGHTPAREN_CODE semicolon - SEMICOLON_CODE If any error is caught, create the function that calls the error function.2. A piece of declaration code in C programming language is as follows: typedef struct { int a, b; } CELL, *PCELL; CELL foo[100]; PCELL bar ( int x, CELL y ); Write the type expression for foo and bar. 3. Write an SDT for the following grammar, which can perform type checking. The type of S is the valid type of its body. S -> id := E | if E then S | while E do S | S; SHow does type coercion impact variable operations in loosely-typed languages like JavaScript?
- Subject: Discrete StructuresTopic: Combinations and Permutations A coin is flipped eight times where each flip comes up either heads or tails. How many possible outcomes. a) contain the same number of heads and tails?Using the syntax of C, write a recursive-descent subprogram named initializer that corresponds to the following rules (taken from the C99 standard): initializer: assignment-expression { initializer-list } { initializer-list,} Note that { and } are terminals, not metasymbols. Assume that recursive-descent subprograms named assignment-expression and initializer-list already exist.Can you please help me solve this in C language? I did encounter and solve this problem with Java but I cannot seem to implement the use of structures in solving this problem. Help is appreciated, thank you. Using the concept of structures, write a program to assign passenger seats in an airplane. Assume a small airplane with seats numbered as follows: 1 A B C D 2 A B C D 3 A B C D 4 A B C D 5 A B C D The program should display the seat pattern, marking with an ‘X’ the seats already assigned. For example, after seats 1A, 2B, and 4C are taken, the display should look like: 1 X B C D 2 A X C D 3 A B C D 4 A B X D 5 A B C D Seats are assigned by specifying a number and a letter. If the user types in a seat that is already assigned, the program should say that the seat is occupied and ask for another choice. The program should run until all seats are…
- Recursive Syntax The recursive structure i.e of natural language like English can be expressed in syntax rules written in the format known as BNF (Bachus-Naur Form). While BNF is ordinarily used as a guide for parsing (that is, determining whether and how a given string follows the syntax rules), An example of this can be found in the sample program SimpleRandomSentences. You should write a similar program that implements the following rules:<sentence> ::= <simple_sentence> [ <conjunction> <sentence> ]<simple_sentence> ::= <noun_phrase> <verb_phrase><noun_phrase> ::= <proper_noun> |<determiner> [ <adjective> ]. <common_noun> [ who <verb_phrase> ]<verb_phrase> ::= <intransitive_verb> |<transitive_verb> <noun_phrase> |is <adjective> |believes that <simple_sentence><conjunction> ::= and | or | but | because<proper_noun> ::= Fred | Jane | Richard Nixon | Miss…pseudo code for the java assignmentExplain how coercion rules can weaken the beneficial effect of strong typing.