Creating the Concatenation of Arrays Program

This document will guide you through the process of creating and running this program using Flex, Bison, and Cygwin commands.

1. Files required

This repo has two important files, those being the lexer.l and parser.y file:

• lexer.l (the Flex file) defines the lexical rules for tokenizing input.
• parser.y (the Bison file) specifies the grammar for parsing and handling syntax.

2. Commands Used for Compilation

2.1 Running Flex Command

If you decide to modify the Flex file, to process it, use the following command:

flex filename

2.2 Running Bison Command

If you decide to modify the Bison file, to process it, use the following command:

bison -d filename

2.3 Compiling the Files

After running the above commands, compile the generated filesparser.tab.c and lex.yy.c into an executable program using the following command:

gcc -o your_program_name parser.tab.c lex.yy.c -lfl

This command will produce an executable file which you will then be able to run with Cygwin.

3. Running the Program

For this program, the file to open is not hard-coded, so you will need to provide the name of your input file^[It only accepts text files] to run the program. Say your program name is validator, and the input file you want to use is named input.txt, then, you would run the command like this:

./validator.exe input.txt

I hope this guide was helpful.