1.1 OBJECTIVE:Design a lexical analyzer for given language and the lexical analyzer should ignore redundant spaces, tabs and new lines. It should also ignore comments. Although the syntax specification states that identifiers can be arbitrarily long, you may restrict the length to some reasonable value. Simulate the same in C language. 1.2 PROGRAM LOGIC: Read the input Expression 2. Check whether input is alphabet or digits then store it as identifier 3. If the input is is operator store it as symbol 4. Check the input for keywords

1.1 OBJECTIVE:Design a lexical analyzer for given language and the lexical analyzer should ignore redundant spaces, tabs and new lines. It should also ignore comments. Although the syntax specification states that identifiers can be arbitrarily long, you may restrict the length to some reasonable value. Simulate the same in C language. 1.2 PROGRAM LOGIC: Read the input Expression 2. Check whether input is alphabet or digits then store it as identifier 3. If the input is is operator store it as symbol 4. Check the input for keywords

C++ for Engineers and Scientists

4th Edition

ISBN:9781133187844

Author:Bronson, Gary J.

Publisher:Bronson, Gary J.

Chapter9: Completing The Basics

Section9.6: A Closer Look: Namespaces And Creating A Personal Library

Problem 3E: (For thought) a. What’s an advantage of namespaces? b. What’s a possible disadvantage of namespaces?

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EXPLAIN THIS C++ PROGRAM STEP BY STEP WITH LOGIC #include<iostream>using namespace std;class Circle{private: //To Store center (x,y) and radius r double x,y,r; static int number_of_circles;public: //parameterized constructor Circle(double x1,double y1,double r1){ x=x1; y=y1; r=r1; update_number_of_circles(); } //Copy constructor Circle(Circle &c){ x=c.x; y=c.y; r=c.r; update_number_of_circles(); } //member function to display the values x,y,r void display(){ cout<<"Center : ("<<x<<" , "<<y<<") Radius : "<<r<<endl; } static void update_number_of_circles(){ number_of_circles++; } static int get_number_of_circles(){ return number_of_circles; } friend void updateCircle(double x,double y,double r,Circle &c){ c.x=x; c.y=y; c.r=r; }};int Circle::number_of_circles=0;int main(){…
3. Imagine we have a new programming language with identifiers that is made up from letter and digits But in an unusual way. Create a Regular Expressions for both a) where the identifier must have at least one letter, but it need not be the first character. e.g. a21, a, 2a, 321a, a321 but not 321 b) where the identifier must have at least one letter and there must be at least one digit before the leftmost letter. e.g. 321a, 3a21, 321abc but not a2i (no digits left of â€˜aâ€™)
Topic: Concepts of programming Language 4. a) Consider the following JavaScript program: var a, y, c;function sub1() {var b, z, c;function sub2() {var a, b, y;. . .}. . .}function sub3() {var a, x, w;. . .}List all the variables, along with the program units where they are declared,that are visible in the bodies of sub2 when the sequence of function call is:“sub1 calls sub3 and sub3 calls sub2”, assuming dynamic scoping is used.
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2.8 Should a language require the declaration of variables? Languages such as Lisp and Python allow variable names to be used without declarations, while C, Java, and Ada require all variables to be declared. Discuss the requirement that variables should be declared from the point of view of readability, writability, efficiency, and security.
(For thought) a. What’s an advantage of namespaces? b. What’s a possible disadvantage of namespaces?
Discuss the memory overhead associated with function objects, especially in languages that heavily use closures.
Although Algol60's flexible style permits statements to start and stop anywhere, the majority of programming languages today demand that statements explicitly end with an end symbol, such as a semicolon or a colon. In contrast, Python and a select few other programming languages have a predefined structure whereby statements start in a certain column and conclude at the end of a line of code unless continuation marks are included for each statement. You will discover how fixed or free formats affect readability, writability, and security in this section.
Imagine a function f in HASKELL that has the type Ord a => a -> a -> Bool, and then it's partially applied it to one numeric value. Create a function f, and also a function g that is the partially applied f.
8. Explain the concept of operator precedence and associativity in programming languages. How does understanding these concepts aid in writing and interpreting complex expressions?
Concepts of programming language Consider the following JavaScript program: var a, y, c;function sub1() {var b, z, c;function sub2() {var a, b, y;. . .}. . .}function sub3() {var a, x, w;. . .}List all the variables, along with the program units where they are declared,that are visible in the bodies of sub2 when the sequence of function call is:“sub1 calls sub3 and sub3 calls sub2”, assuming dynamic scoping is used.
a- Rewrite the following code segment using a multiple selection statement in thefollowing languages C, C++, or Java (Assume all variables are integer type):if (k = 1) or (k = 2) then j := 2 * k -1if (k = 3) or (k = 5) then j := 3 * k + 1if (k = 4) then j := 4 * k - 1if (k = 6) or (k = 7) or (k = 8) then j := k – 2 b- Consider the following case statement. Rewrite it using only two-way selection.case index - 1 of:2, 4: even := even + 1;1, 3: odd := odd + 1;0: zero := zero + 1;else error := trueend case