Updates

Author: melchisedech333

LICENSE.txt renamed to license

@@ -1,4 +1,4 @@
-Copyright (c) 2022, Melchisedech333.
+Copyright (c) 2022, melchisedech333 (Github Profile).
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

readme-pt.md

@@ -0,0 +1,88 @@
+<p align='center'>
+    <img src="extras/images/Parse_Tree_Derivations.svg" width="500" >
+</p>
+
+<p align="center">
+    <img src="https://img.shields.io/github/languages/count/melchisedech333/lex-yacc-experiments?style=for-the-badge" >
+    <img src="https://img.shields.io/github/repo-size/melchisedech333/lex-yacc-experiments?style=for-the-badge" >
+</p>
+
+<br>
+
+Language: <a href="readme.md">EN-US</a>
+
+Aqui estão meus códigos, estudos e experimentos em geral, que realizei usando as ferramentas para análise de gramática livre de contexto. As ferramentas que utilizei são <b>lex</b>, <b>yacc</b> e <b>bison</b>.
+
+**Se algum código foi útil para você, considere [ser um patrocinador](https://github.com/sponsors/melchisedech333) :blue_heart:** 
+
+<br>
+
+:bookmark_tabs: Sumário
+-----
+* [Instruções](#hammer_and_wrench-instruções)
+* [Autor](#smiley-autor)
+* [Licença](#scroll-licença)
+-----
+
+<br>
+
+:hammer_and_wrench: Instruções
+---
+
+Each directory is equivalent to a specific test. And to compile run the file <b>compile-and-run.sh</b> passing the directory name as a parameter.
+
+```bash
+./compile-and-run.sh "2 - filter tokens"
+```
+
+After compiling, just run the generated file with the name <b>parsing</b>, and type the input.
+
+```bash
+./parsing
+```
+
+For this example in question (using the <b>2 - filter tokens</b>), a valid input could be:
+
+```
+10 20 30 A
+```
+
+For this input, the output will be:
+
+```
+type: INTEGER
+token: 10
+
+type: INTEGER
+token: 20
+
+type: INTEGER
+token: 30
+
+type: UNKNOWN
+token: A
+```
+
+It is important to mention that within each directory there is a file called <b>input.txt</b>, which contain one (or more) possible example entries.
+
+<br>
+
+:smiley: Autor
+---
+
+Patrocinar: [melchisedech333](https://github.com/sponsors/melchisedech333)<br>
+YouTube: [Melchisedech](https://www.youtube.com/channel/UC4Sh4wxncr5arnydpUfWPKw)<br>
+Twitter: [Melchisedech333](https://twitter.com/Melchisedech333)<br>
+Blog: [melchisedech333.github.io](https://melchisedech333.github.io/)<br>
+LinkedIn: [Melchisedech Rex](https://www.linkedin.com/in/melchisedech-rex-724152235/)
+
+<img src="https://github.com/melchisedech333.png?size=200" height="100" />
+
+<br>
+
+:scroll: Licença
+---
+
+[ BSD-3-Clause license](./license)
+
+

README.md renamed to readme.md

@@ -9,6 +9,8 @@
 
 <br>
 
+Language: <a href="readme-pt.md">PT-BR</a>
+
 Here are my codes, studies and experiments in general, which I performed using the tools for context-free grammar analysis. They are <b>lex</b>, <b>yacc</b> and <b>bison</b>.
 
 **If my code has helped you, please consider [sponsoring me](https://github.com/sponsors/melchisedech333) :blue_heart:** 
@@ -81,6 +83,6 @@ LinkedIn: [Melchisedech Rex](https://www.linkedin.com/in/melchisedech-rex-724152
 :scroll: License
 ---
 
-[ BSD-3-Clause license](./LICENSE.txt)
+[ BSD-3-Clause license](./license)