1. 0(0+1)*0 This regular expression matches any string that starts and ends with 0. Breakdown: The first 0 ensures the string starts with 0. (0+1)* means the middle part of the string can be any combination of 0s and 1s (zero or more occurrences of 0 or 1). The final 0 ensures the string ends […]
Lex program contains three sections: definitions, rules, and user subroutines. Each section must be separated from the others by a line containing only the delimiter, %%. The format is as follows: definitions %% rules %% user_subroutines In definition section, the variables make up the left column, and their definitions make up the right column. Any […]
This program reads a C source code file, tokenizes it into keywords, identifiers, and special characters, and counts the lines. It also ignores redundant spaces, tabs, and new lines while processing the input #include <stdio.h>#include <stdlib.h>#include <string.h>#include <ctype.h>void keyword(char str[10]) {// Check if the given string is a keyword or an identifierif (strcmp(“for”, str) == […]
This program is designed to read an operator input from the user and determine what type of operator it is. It uses a switch statement to analyze the input and identify single-character and double-character operators, such as: Greater than (>) and Greater than or equal to (>=) Less than (<) and Less than or equal […]
To convert the regular expression (a + b)*abb from an NFA to a DFA using Thompson’s construction, we will follow these steps: Create an NFA for (a + b)*abb using Thompson’s construction. Convert the NFA into a DFA using the subset construction method. Provide the transition table for the DFA. Draw the DFA diagram. Step […]
Instructions are the fundamental commands executed by a computer’s Central Processing Unit (CPU). These commands tell the CPU what actions to perform on the data, which can include tasks like arithmetic operations, data movement, and branching (decision-making). In computer organization, understanding instructions and how they are sequenced is critical for executing programs efficiently. 1. Instructions: […]
This C program is designed to recognize and classify strings according to three specific rules or patterns: a*: A string consisting of zero or more ‘a’ characters. a*b+: A string that starts with zero or more ‘a’ characters followed by one or more ‘b’ characters. abb: A string that follows exactly the pattern ‘abb’. The […]
Rules for Valid Identifiers in C: The identifier must begin with a letter or an underscore (_). It cannot start with a number or any other symbol. Subsequent characters may be letters, digits, or underscores. Special characters like @, #, or spaces are not allowed. Keywords cannot be used as identifiers. Keywords like int, float, […]
