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<a href="https://foo.zone">Home</a> | <a href="https://codeberg.org/snonux/foo.zone/src/branch/content-md/gemfeed/2014-03-24-the-fibonacci.pl.c-polyglot.md">Markdown</a> | <a href="gemini://foo.zone/gemfeed/2014-03-24-the-fibonacci.pl.c-polyglot.gmi">Gemini</a>
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<h1 style='display: inline' id='the-fibonacciplrakuc-polyglot'>The fibonacci.pl.raku.c Polyglot</h1><br />
<br />
<span class='quote'>Published at 2014-03-24T21:32:53+00:00; Updated at 2022-04-23</span><br />
<br />
<span>In computing, a polyglot is a computer program or script written in a valid form of multiple programming languages, which performs the same operations or output independent of the programming language used to compile or interpret it.</span><br />
<br />
<a class='textlink' href='https://en.wikipedia.org/wiki/Polyglot_(computing)'>https://en.wikipedia.org/wiki/Polyglot_(computing)</a><br />
<br />
<h2 style='display: inline' id='the-fibonacci-numbers'>The Fibonacci numbers</h2><br />
<br />
<span>For fun, I programmed my own Polyglot, which is both valid Perl, Raku, C and C++ code (I have added C++ and Raku support in 2022). The exciting part about C and C++ is that $ is a valid character to start variable names with:</span><br />
<br />
<!-- Generator: GNU source-highlight 3.1.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><i><font color="#ababab">#include <stdio.h></font></i>
<i><font color="#ababab">#define $arg function_argument</font></i>
<i><font color="#ababab">#define my int</font></i>
<i><font color="#ababab">#define sub int</font></i>
<i><font color="#ababab">#define BEGIN int main(void)</font></i>
<b><font color="#ffffff">my</font></b><font color="#ff0000"> </font><font color="#ff0000">$arg</font><font color="#F3E651">;</font>
<b><font color="#ffffff">sub</font></b><font color="#ff0000"> </font><font color="#7bc710">hello</font><font color="#F3E651">()</font><font color="#ff0000"> </font><font color="#F3E651">{</font>
<font color="#ff0000"> </font><b><font color="#ffffff">printf</font></b><font color="#F3E651">(</font><font color="#bb00ff">"Hello, welcome to the Fibonacci Numbers!\n"</font><font color="#F3E651">);</font>
<font color="#ff0000"> </font><b><font color="#ffffff">printf</font></b><font color="#F3E651">(</font><font color="#bb00ff">"This program is all, valid C and C++ and Perl and Raku code!\n"</font><font color="#F3E651">);</font>
<font color="#ff0000"> </font><b><font color="#ffffff">printf</font></b><font color="#F3E651">(</font><font color="#bb00ff">"It calculates all fibonacci numbers from 0 to 9!\n\n"</font><font color="#F3E651">);</font>
<font color="#ff0000"> </font><b><font color="#ffffff">return</font></b><font color="#ff0000"> </font><font color="#bb00ff">0</font><font color="#F3E651">;</font>
<font color="#F3E651">}</font>
<b><font color="#ffffff">sub</font></b><font color="#ff0000"> </font><font color="#7bc710">fibonacci</font><font color="#F3E651">()</font><font color="#ff0000"> </font><font color="#F3E651">{</font>
<font color="#ff0000"> </font><b><font color="#ffffff">my</font></b><font color="#ff0000"> </font><font color="#ff0000">$n</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#ff0000">$arg</font><font color="#F3E651">;</font>
<font color="#ff0000"> </font><b><font color="#ffffff">if</font></b><font color="#ff0000"> </font><font color="#F3E651">(</font><font color="#ff0000">$n</font><font color="#ff0000"> </font><font color="#F3E651"><</font><font color="#ff0000"> </font><font color="#bb00ff">2</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">{</font>
<font color="#ff0000"> </font><b><font color="#ffffff">return</font></b><font color="#ff0000"> </font><font color="#ff0000">$n</font><font color="#F3E651">;</font>
<font color="#ff0000"> </font><font color="#F3E651">}</font>
<font color="#ff0000"> </font><font color="#ff0000">$arg</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#ff0000">$n</font><font color="#ff0000"> </font><font color="#F3E651">-</font><font color="#ff0000"> </font><font color="#bb00ff">1</font><font color="#F3E651">;</font>
<font color="#ff0000"> </font><b><font color="#ffffff">my</font></b><font color="#ff0000"> </font><font color="#ff0000">$fib1</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#7bc710">fibonacci</font><font color="#F3E651">();</font>
<font color="#ff0000"> </font><font color="#ff0000">$arg</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#ff0000">$n</font><font color="#ff0000"> </font><font color="#F3E651">-</font><font color="#ff0000"> </font><font color="#bb00ff">2</font><font color="#F3E651">;</font>
<font color="#ff0000"> </font><b><font color="#ffffff">my</font></b><font color="#ff0000"> </font><font color="#ff0000">$fib2</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#7bc710">fibonacci</font><font color="#F3E651">();</font>
<font color="#ff0000"> </font><b><font color="#ffffff">return</font></b><font color="#ff0000"> </font><font color="#ff0000">$fib1</font><font color="#ff0000"> </font><font color="#F3E651">+</font><font color="#ff0000"> </font><font color="#ff0000">$fib2</font><font color="#F3E651">;</font>
<font color="#F3E651">}</font>
<font color="#ff0000">BEGIN </font><font color="#F3E651">{</font>
<font color="#ff0000"> </font><font color="#7bc710">hello</font><font color="#F3E651">();</font>
<font color="#ff0000"> </font><b><font color="#ffffff">my</font></b><font color="#ff0000"> </font><font color="#ff0000">$i</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">0</font><font color="#F3E651">;</font>
<font color="#ff0000"> </font><b><font color="#ffffff">while</font></b><font color="#ff0000"> </font><font color="#F3E651">(</font><font color="#ff0000">$i</font><font color="#ff0000"> </font><font color="#F3E651"><=</font><font color="#ff0000"> </font><font color="#bb00ff">10</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">{</font>
<font color="#ff0000"> </font><font color="#ff0000">$arg</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#ff0000">$i</font><font color="#F3E651">;</font>
<font color="#ff0000"> </font><b><font color="#ffffff">printf</font></b><font color="#F3E651">(</font><font color="#bb00ff">"fib(%d) = %d\n"</font><font color="#F3E651">,</font><font color="#ff0000"> </font><font color="#ff0000">$i</font><font color="#F3E651">,</font><font color="#ff0000"> </font><font color="#7bc710">fibonacci</font><font color="#F3E651">());</font>
<font color="#ff0000"> </font><font color="#ff0000">$i</font><font color="#F3E651">++;</font>
<font color="#ff0000"> </font><font color="#F3E651">}</font>
<font color="#F3E651">}</font>
</pre>
<br />
<span>You can find the full source code at GitHub:</span><br />
<br />
<a class='textlink' href='https://codeberg.org/snonux/perl-c-fibonacci'>https://codeberg.org/snonux/perl-c-fibonacci</a><br />
<br />
<h3 style='display: inline' id='let-s-run-it-with-c-and-c'>Let's run it with C and C++</h3><br />
<br />
<!-- Generator: GNU source-highlight 3.1.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><font color="#F3E651">%</font><font color="#ff0000"> gcc fibonacci</font><font color="#F3E651">.</font><font color="#ff0000">pl</font><font color="#F3E651">.</font><font color="#ff0000">raku</font><font color="#F3E651">.</font><font color="#ff0000">c -o fibonacci</font>
<font color="#F3E651">%</font><font color="#ff0000"> </font><font color="#F3E651">.</font><font color="#ff0000">/fibonacci</font>
<font color="#ff0000">Hello</font><font color="#F3E651">,</font><font color="#ff0000"> welcome to the Fibonacci Numbers</font><font color="#F3E651">!</font>
<font color="#ff0000">This program is all</font><font color="#F3E651">,</font><font color="#ff0000"> valid C and C</font><font color="#F3E651">++</font><font color="#ff0000"> and Perl and Raku code</font><font color="#F3E651">!</font>
<font color="#ff0000">It calculates all fibonacci numbers from </font><font color="#bb00ff">0</font><font color="#ff0000"> to </font><font color="#bb00ff">9</font><font color="#F3E651">!</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">0</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">0</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">1</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">1</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">2</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">1</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">3</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">2</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">4</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">3</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">5</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">5</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">6</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">8</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">7</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">13</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">8</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">21</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">9</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">34</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">10</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">55</font>
<font color="#F3E651">%</font><font color="#ff0000"> g</font><font color="#F3E651">++</font><font color="#ff0000"> fibonacci</font><font color="#F3E651">.</font><font color="#ff0000">pl</font><font color="#F3E651">.</font><font color="#ff0000">raku</font><font color="#F3E651">.</font><font color="#ff0000">c -o fibonacci</font>
<font color="#F3E651">%</font><font color="#ff0000"> </font><font color="#F3E651">.</font><font color="#ff0000">/fibonacci</font>
<font color="#ff0000">Hello</font><font color="#F3E651">,</font><font color="#ff0000"> welcome to the Fibonacci Numbers</font><font color="#F3E651">!</font>
<font color="#ff0000">This program is all</font><font color="#F3E651">,</font><font color="#ff0000"> valid C and C</font><font color="#F3E651">++</font><font color="#ff0000"> and Perl and Raku code</font><font color="#F3E651">!</font>
<font color="#ff0000">It calculates all fibonacci numbers from </font><font color="#bb00ff">0</font><font color="#ff0000"> to </font><font color="#bb00ff">9</font><font color="#F3E651">!</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">0</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">0</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">1</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">1</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">2</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">1</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">3</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">2</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">4</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">3</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">5</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">5</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">6</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">8</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">7</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">13</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">8</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">21</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">9</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">34</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">10</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">55</font>
</pre>
<br />
<h3 style='display: inline' id='let-s-run-it-with-perl-and-raku'>Let's run it with Perl and Raku</h3><br />
<br />
<!-- Generator: GNU source-highlight 3.1.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><font color="#F3E651">%</font><font color="#ff0000"> perl fibonacci</font><font color="#F3E651">.</font><font color="#ff0000">pl</font><font color="#F3E651">.</font><font color="#ff0000">raku</font><font color="#F3E651">.</font><font color="#ff0000">c</font>
<font color="#ff0000">Hello</font><font color="#F3E651">,</font><font color="#ff0000"> welcome to the Fibonacci Numbers</font><font color="#F3E651">!</font>
<font color="#ff0000">This program is all</font><font color="#F3E651">,</font><font color="#ff0000"> valid C and C</font><font color="#F3E651">++</font><font color="#ff0000"> and Perl and Raku code</font><font color="#F3E651">!</font>
<font color="#ff0000">It calculates all fibonacci numbers from </font><font color="#bb00ff">0</font><font color="#ff0000"> to </font><font color="#bb00ff">9</font><font color="#F3E651">!</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">0</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">0</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">1</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">1</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">2</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">1</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">3</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">2</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">4</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">3</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">5</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">5</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">6</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">8</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">7</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">13</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">8</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">21</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">9</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">34</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">10</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">55</font>
<font color="#F3E651">%</font><font color="#ff0000"> raku fibonacci</font><font color="#F3E651">.</font><font color="#ff0000">pl</font><font color="#F3E651">.</font><font color="#ff0000">raku</font><font color="#F3E651">.</font><font color="#ff0000">c</font>
<font color="#ff0000">Hello</font><font color="#F3E651">,</font><font color="#ff0000"> welcome to the Fibonacci Numbers</font><font color="#F3E651">!</font>
<font color="#ff0000">This program is all</font><font color="#F3E651">,</font><font color="#ff0000"> valid C and C</font><font color="#F3E651">++</font><font color="#ff0000"> and Perl and Raku code</font><font color="#F3E651">!</font>
<font color="#ff0000">It calculates all fibonacci numbers from </font><font color="#bb00ff">0</font><font color="#ff0000"> to </font><font color="#bb00ff">9</font><font color="#F3E651">!</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">0</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">0</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">1</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">1</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">2</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">1</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">3</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">2</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">4</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">3</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">5</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">5</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">6</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">8</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">7</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">13</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">8</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">21</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">9</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">34</font>
<font color="#ff0000">fib</font><font color="#F3E651">(</font><font color="#bb00ff">10</font><font color="#F3E651">)</font><font color="#ff0000"> </font><font color="#F3E651">=</font><font color="#ff0000"> </font><font color="#bb00ff">55</font>
</pre>
<br />
<span>It's entertaining to play with :-).</span><br />
<br />
<span>E-Mail your comments to <span class='inlinecode'>paul@nospam.buetow.org</span> :-)</span><br />
<br />
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