Lexical Analyser and Syntax Analyser

A small C project that performs lexical analysis and basic syntax analysis for C source files. The code is intentionally structured so it is easy to read, explain, and rewrite for coursework or decision-making AI demonstrations.

Features

• Detects keywords, identifiers, numbers, strings, characters, comments, preprocessor lines, operators, and punctuators.
• Checks basic syntax such as matching brackets, common missing semicolons, and parentheses after if, for, while, and switch.
• Prints an ASCII logo banner, colored token table, syntax result, and summary.
• Asks whether the same analyser output should be saved to a text file.
• Names saved reports from the input source file, such as sample_run.txt.
• Includes a simple C-based browser GUI for pasting or loading code and viewing terminal-style analyzer output, with a separate Keywords view.

Build

make

Run

./lexical_analyser examples/sample.c

or:

make run

When prompted, type yes to save the token and syntax report, or no to only show it in the terminal.

GUI

make gui

In the GUI, paste code directly into the editor or use Load File to open a source file. Press Analyze Code to populate the terminal-style output. Use Terminal for the full report and Keywords for keyword-only output. The command starts a local C server and opens the interface in your browser.

Files

include/   shared analyser declarations
src/       lexer, syntax checker, display, keywords, and main program
examples/  sample input program