This repository contains solutions to a set of lexical analyzer assignments using Flex (Fast Lexical Analyzer Generator).

The project is organized into three separate questions/solutions:

• Q1: Word Count Analyzer
• Q2: Text Capitalizer
• Q3: Verb Recognizer

A lexical analyzer that counts the total number of words in a text file and calculates their combined size in characters.

Files:

• verb_recognizer.1: The Flex source file
• lex.yy.c: The C code generated by Flex
• verb_recognizer: The compiled executable
• input.txt: Sample input text for testing

Usage:

cd Q1
flex word_counter.1
gcc lex.yy.c -o word_counter -lfl
./verb_recognizer < input.txt

A lexical analyzer that capitalizes text from the input.

Files:

• capitalize.1: The Flex source file (binary)
• lex.yy.c: The C code generated by Flex
• input.txt: Sample input text for testing

Usage:

cd Q2
flex capitalize.1
gcc lex.yy.c -o capitalize -lfl
./capitalize < input.txt

A lexical analyzer that identifies and extracts common English verbs from text.

Files:

• verb_recognizer.1: The Flex source file
• lex.yy.c: The C code generated by Flex
• input.txt: Sample input text containing verbs for testing

Usage:

cd Q3
flex verb_recognizer.1
gcc lex.yy.c -o verb_recognizer -lfl
./verb_recognizer < input.txt

Each solution can be compiled using the following general steps:

1. Generate C code from the Flex source file:

   flex filename.l

2. Compile the generated C code:

   gcc lex.yy.c -o output_name -lfl

3. Run the program with input:

   ./output_name < input.txt

• Flex (Fast Lexical Analyzer Generator)
• GCC (GNU Compiler Collection)

This project is provided for educational purposes.