Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
Programming Languages Articles
Page 5 of 18
Construct a Predictive Parsing table for the following grammar & also check whether string \\nid + id * id is accepted or not.
Problem − Consider the following grammar − E → TE′ E′ → +TE′|ε T′ → FT′ T′ → FT′|ε F → (E)|id Solution − Step1− Elimination of Left Recursion & perform Left Factoring As there is no left recursion in Grammar so, we will proceed as it is. Also, there is no need for Left Factoring. Step2− Computation of FIRST FIRST(E) = FIRST(T) = FIRST(F) = {(, id} FIRST (E′) = {+, ε} FIRST (T′) = {*, ε} Step3− Computation of FOLLOW FOLLOW (E) = FOLLOW(E′) = {), $} FOLLOW (T) = FOLLOW(T′) = {+, ), $} FOLLOW (F) = ...
Read MoreWhat is LEX?
It is a tool or software which automatically generates a lexical analyzer (finite Automata). It takes as its input a LEX source program and produces lexical Analyzer as its output. Lexical Analyzer will convert the input string entered by the user into tokens as its output.LEX is a program generator designed for lexical processing of character input/output stream. Anything from simple text search program that looks for pattern in its input-output file to a C compiler that transforms a program into optimized code.In program with structure input-output two tasks occurs over and over. It can divide the input-output into meaningful ...
Read MoreWhat is Input Buffering in Compiler Design?
Lexical Analysis has to access secondary memory each time to identify tokens. It is time-consuming and costly. So, the input strings are stored into a buffer and then scanned by Lexical Analysis.Lexical Analysis scans input string from left to right one character at a time to identify tokens. It uses two pointers to scan tokens −Begin Pointer (bptr) − It points to the beginning of the string to be read.Look Ahead Pointer (lptr) − It moves ahead to search for the end of the token.Example − For statement int a, b;Both pointers start at the beginning of the string, which ...
Read MoreWhat is techniques of storage allocation in compiler design?
There are various storage allocation techniques are as follows −Static AllocationIt is the simplest allocation scheme in which allocation of data objects is done at compile time because the size of every data item can be determined by the compiler.Recursive Subprogram and Arrays of adjustable length are not permitted in a language. In static allocation, the compiler can decide the amount of storage needed by each data object. Thus, it becomes easy for a compiler to identify the address of these data in the activation record.FORTRAN uses this kind of storage allocation strategies.AdvantagesIt is easy to implement.It allows type checking ...
Read MoreWhat is Syntax Tree?
Tree in which each leaf node describes an operand & each interior node an operator. The syntax tree is shortened form of the Parse Tree.Example1 − Draw Syntax Tree for the string a + b ∗ c − d.Rules for constructing a syntax treeEach node in a syntax tree can be executed as data with multiple fields. In the node for an operator, one field recognizes the operator and the remaining field includes a pointer to the nodes for the operands. The operator is known as the label of the node. The following functions are used to create the nodes ...
Read MoreDevDocs Alternatives
What is DevDocs? DevDocs is a tool which consists of documentation of different programming languages which software developers can use. They do not have to navigate to different websites as all documentations will be available on this single website. The app also has a mobile version along with some more features like keyboard shortcuts, a dark theme, etc. A search bar is available which can be used to search the required information. Why DevDocs alternatives? The platform does not have any cons. How to choose a DevDocs Alternative? Access the platform to access documentation for different technologies. The user ...
Read MoreReplit Alternatives
What is Replit? Replit is an online platform and you can use it to create a lot of projects. You need to do an easy setup to create projects. It is a platform where programs can be created and executed in 50 programming languages. The platform also consists of many programming courses which you can avail to enhance your knowledge. You need to create an account to use the features of Replit. The account can be created by using Google, GitHub, and Facebook or there is also an option of creating your own username and password. Price Plans of Replit ...
Read MoreDifference Between High-Level Language and Low-Level Language
A language is basically a mode of communication, because it is used to share information, ideas, and opinions. In computer systems, programming languages are used by the software developers or programmers to creates applications or software systems. A programming language provides a way of writing computer instructions that are used to perform a specific task. Examples of computer programming languages include C, C++, Java, Python, Ruby, Scala, Perl, C#, Groovy, Dart, etc. Based on the closeness of a programming language to the system hardware (mainly processor), computer programming languages are classified into two categories namely, high-level languages and low-level languages. ...
Read MoreDifference Between Top-down and Bottom-up Approach
In the top-down approach, a bigger module/problem is divided into smaller modules. In contrast, in the bottom-up approach, the smaller problems are solved and then they are integrated to find the solution of a bigger problem. Read this article to learn more about top-down approach and bottom-up approach and how they are different from each other. What is Top-Down Approach? Top-Down Approach is an approach to design algorithms in which a bigger problem is broken down into smaller parts. Thus, it uses the decomposition approach. This approach is generally used by structured programming languages such as C, COBOL, FORTRAN. The ...
Read More5 Best Programming Languages for the Artificial Intelligence Field
With its automation, data insights, and decision−making powers, AI has become extremely important and is revolutionizing several sectors. The correct programming language must be chosen in order to fully realize its potential. Models, methods, and applications for AI are built on top of the language. Considerations should be made for things like the language's applicability to certain AI workloads, library accessibility, community support, and performance standards. Developers can successfully use AI and assure successful development processes by selecting the right language. 5 Best Programming Languages Python Python's extreme popularity and versatility have led to it becoming the primary programming language ...
Read More