The navigation bar for a winning entry now has a "_Original C_" link
(between the ✅ and the Inventory on the right hand side) so that one
may easily view the original C code that was submitted for IOCCC judging.
Ran `make www timestamp` to perform the above.
710 lines
26 KiB
HTML
710 lines
26 KiB
HTML
<!DOCTYPE html>
|
||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||
<!-- START: two lines up starts content from: inc/top.default.html -->
|
||
|
||
<!-- END: this line ends content from: inc/top.default.html -->
|
||
<!-- START: this line starts content from: inc/head.default.html -->
|
||
|
||
<head>
|
||
<link rel="stylesheet" href="../../ioccc.css">
|
||
<link href="https://fonts.googleapis.com/css2?family=Outfit:wght@100..900&display=swap" rel="stylesheet">
|
||
<meta charset="utf-8">
|
||
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
|
||
<title>2018/yang - Most shifty</title>
|
||
<link rel="icon" type="image/x-icon" href="../../favicon.ico">
|
||
<meta name="description" content="2018 IOCCC entry yang - Most shifty">
|
||
<meta name="keywords" content="IOCCC, 2018, IOCCC 2018, IOCCC entry, yang, Most shifty">
|
||
</head>
|
||
|
||
<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
|
||
<!-- !!! DO NOT MODIFY THIS FILE - This file is generated by a tool !!! -->
|
||
<!-- !!! DO NOT MODIFY THIS FILE - This file is generated by a tool !!! -->
|
||
<!-- !!! DO NOT MODIFY THIS FILE - This file is generated by a tool !!! -->
|
||
<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
|
||
|
||
<!-- END: this line ends content from: inc/head.default.html -->
|
||
|
||
<!-- -->
|
||
<!-- This web page was formed via the tool: bin/readme2index.sh -->
|
||
<!-- The content of main section of this web page came from: 2018/yang/README.md -->
|
||
<!-- -->
|
||
|
||
<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
|
||
<!-- !!! Do not modify this web page, instead modify the file: 2018/yang/README.md !!! -->
|
||
<!-- !!! Do not modify this web page, instead modify the file: 2018/yang/README.md !!! -->
|
||
<!-- !!! Do not modify this web page, instead modify the file: 2018/yang/README.md !!! -->
|
||
<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
|
||
|
||
<!-- Markdown content was converted into HTML via the tool: bin/md2html.sh -->
|
||
|
||
<!-- START: this line starts content from: inc/body.default.html -->
|
||
|
||
<body>
|
||
|
||
<!-- END: this line ends content from: inc/body.default.html -->
|
||
<!-- START: this line starts content from: inc/topbar.default.html -->
|
||
|
||
<div class="theader">
|
||
<nav class="topbar">
|
||
<div class="container">
|
||
<div class="logo">
|
||
<a href="../../index.html" class="logo-link">
|
||
IOCCC
|
||
</a>
|
||
</div>
|
||
|
||
<div class="topbar-items">
|
||
<div class="item">
|
||
<span class="item-header">
|
||
Entries
|
||
</span>
|
||
|
||
<div class="sub-item">
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../years.html" class="sub-item-link">
|
||
Winning entries
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../authors.html" class="sub-item-link">
|
||
Winning authors
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../location.html" class="sub-item-link">
|
||
Location of authors
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../bugs.html" class="sub-item-link">
|
||
Bugs and (mis)features
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../faq.html#fix_an_entry" class="sub-item-link">
|
||
Fixing entries
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../faq.html#fix_author" class="sub-item-link">
|
||
Updating author info
|
||
</a>
|
||
</div>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
<div class="item">
|
||
<span class="item-header">
|
||
Status
|
||
</span>
|
||
|
||
<div class="sub-item">
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../news.html" class="sub-item-link">
|
||
News
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../status.html" class="sub-item-link">
|
||
Contest status
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../next/rules.html" class="sub-item-link">
|
||
IOCCC rules
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../next/guidelines.html" class="sub-item-link">
|
||
IOCCC guidelines
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../markdown.html" class="sub-item-link">
|
||
Markdown guidelines
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../SECURITY.html" class="sub-item-link">
|
||
Security policy
|
||
</a>
|
||
</div>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
<div class="item">
|
||
<span class="item-header">
|
||
FAQ
|
||
</span>
|
||
|
||
<div class="sub-item">
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../faq.html" class="sub-item-link">
|
||
Frequently asked questions
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../quick-start.html#enter" class="sub-item-link">
|
||
Enter the IOCCC
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../faq.html#compiling" class="sub-item-link">
|
||
Compiling entries
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../faq.html#running_entries" class="sub-item-link">
|
||
Running entries
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../faq.html#help" class="sub-item-link">
|
||
How to help
|
||
</a>
|
||
</div>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
<div class="item">
|
||
<span class="item-header">
|
||
About
|
||
</span>
|
||
|
||
<div class="sub-item">
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../index.html" class="sub-item-link">
|
||
Home page
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../social.html" class="sub-item-link">
|
||
IOCCC social media
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../about.html" class="sub-item-link">
|
||
About the IOCCC
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../judges.html" class="sub-item-link">
|
||
The judges
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../thanks-for-help.html" class="sub-item-link">
|
||
Thanks for the help
|
||
</a>
|
||
</div>
|
||
|
||
<div class="outfit-font">
|
||
<a href="../../contact.html" class="sub-item-link">
|
||
Contact us
|
||
</a>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</nav>
|
||
|
||
<div class="header-mobile-menu">
|
||
<noscript>
|
||
<a href="../../nojs-menu.html" class="topbar-js-label">
|
||
Please Enable JavaScript
|
||
</a>
|
||
</noscript>
|
||
|
||
<button id="header-open-menu-button" class="topbar-mobile-menu">
|
||
<img
|
||
src="../../png/hamburger-icon-open.png"
|
||
alt="hamburger style menu icon - open state"
|
||
width=48
|
||
height=48>
|
||
</button>
|
||
|
||
<button id="header-close-menu-button" class="hide-content">
|
||
<img
|
||
src="../../png/hamburger-icon-closed.png"
|
||
alt="hamburger style menu icon - closed state"
|
||
width=48
|
||
height=48>
|
||
</button>
|
||
|
||
<div id="mobile-menu-panel" class="hide-content">
|
||
<div class="mobile-menu-container">
|
||
|
||
<div class="mobile-menu-wrapper">
|
||
<div class="mobile-menu-item">
|
||
Entries
|
||
</div>
|
||
<div class="mobile-submenu-wrapper">
|
||
|
||
<a class="mobile-submenu-item" href="../../years.html">
|
||
Winning entries
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../authors.html">
|
||
Winning authors
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../location.html">
|
||
Location of authors
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../bugs.html">
|
||
Bugs and (mis)features
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../faq.html#fix_an_entry">
|
||
Fixing entries
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../faq.html#fix_author">
|
||
Updating author info
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../thanks-for-help.html">
|
||
Thanks for the help
|
||
</a>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
<div class="mobile-menu-wrapper">
|
||
|
||
<div class="mobile-menu-item">
|
||
Status
|
||
</div>
|
||
<div class="mobile-submenu-wrapper">
|
||
|
||
<a class="mobile-submenu-item" href="../../news.html">
|
||
News
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../status.html">
|
||
Contest status
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../next/rules.html">
|
||
IOCCC rules
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../next/guidelines.html">
|
||
IOCCC guidelines
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../markdown.html">
|
||
Markdown guidelines
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../SECURITY.html">
|
||
Security policy
|
||
</a>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
<div class="mobile-menu-wrapper">
|
||
<div class="mobile-menu-item">
|
||
FAQ
|
||
</div>
|
||
<div class="mobile-submenu-wrapper">
|
||
|
||
<a class="mobile-submenu-item" href="../../faq.html">
|
||
Frequently asked questions
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../quick-start.html#enter">
|
||
Enter the IOCCC
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../faq.html#compiling">
|
||
Compiling entries
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../faq.html#running_entries">
|
||
Running entries
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../faq.html#help">
|
||
How to help
|
||
</a>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
<div class="mobile-menu-wrapper">
|
||
<div class="mobile-menu-item">
|
||
About
|
||
</div>
|
||
<div class="mobile-submenu-wrapper">
|
||
|
||
<a class="mobile-submenu-item" href="../../index.html">
|
||
Home page
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../social.html">
|
||
IOCCC social media
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../about.html">
|
||
About the IOCCC
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../judges.html">
|
||
The judges
|
||
</a>
|
||
|
||
<a class="mobile-submenu-item" href="../../contact.html">
|
||
Contact us
|
||
</a>
|
||
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
</div>
|
||
|
||
<script>
|
||
var headerOpenMenuButton = document.getElementById("header-open-menu-button");
|
||
var headerCloseMenuButton = document.getElementById("header-close-menu-button");
|
||
var mobileMenuPanel = document.getElementById("mobile-menu-panel");
|
||
|
||
headerOpenMenuButton.addEventListener("click", () => {
|
||
headerOpenMenuButton.classList.remove("topbar-mobile-menu");
|
||
headerOpenMenuButton.classList.add("hide-content");
|
||
|
||
headerCloseMenuButton.classList.remove("hide-content");
|
||
headerCloseMenuButton.classList.add("topbar-mobile-menu");
|
||
|
||
mobileMenuPanel.classList.remove("hide-content");
|
||
mobileMenuPanel.classList.add("topbar-mobile-panel");
|
||
});
|
||
|
||
headerCloseMenuButton.addEventListener("click", () => {
|
||
headerCloseMenuButton.classList.remove("topbar-mobile-menu");
|
||
headerCloseMenuButton.classList.add("hide-content");
|
||
|
||
mobileMenuPanel.classList.add("hide-content");
|
||
mobileMenuPanel.classList.remove("topbar-mobile-panel");
|
||
|
||
headerOpenMenuButton.classList.add("topbar-mobile-menu");
|
||
headerOpenMenuButton.classList.remove("hide-content");
|
||
});
|
||
</script>
|
||
|
||
<!-- END: this line ends content from: inc/topbar.default.html -->
|
||
<!-- START: this line starts content from: inc/header.default.html -->
|
||
|
||
<div class="header">
|
||
<a href="../../2011/zucker/index.html">
|
||
<img src="../../png/ioccc.png"
|
||
alt="IOCCC image by Matt Zucker"
|
||
width=300
|
||
height=110>
|
||
</a>
|
||
<h1>The International Obfuscated C Code Contest</h1>
|
||
<h2>2018/yang - Most shifty</h2>
|
||
<h3>Text rotator and shifter</h3>
|
||
</div>
|
||
|
||
<!-- END: this line ends content from: inc/header.default.html -->
|
||
<!-- START: this line starts content from: inc/navbar.mid.html -->
|
||
|
||
<div class="navbar">
|
||
<a class="Left" href="../vokes/index.html">← 2018/vokes</a>
|
||
<a class="Left" href="../index.html">↑ 2018 ↑</a>
|
||
<a class="Left" href="../../2019/adamovsky/index.html">2019/adamovsky →</a>
|
||
<a class="Right" href="https://github.com/ioccc-src/winner/blob/master/2018/yang/prog.c">C code</a>
|
||
<a class="Right" href="https://github.com/ioccc-src/winner/blob/master/2018/yang/Makefile">Makefile</a>
|
||
<a class="Right" href="#inventory">Inventory</a>
|
||
<a class="Right" href="https://github.com/ioccc-src/winner/blob/master/2018/yang/prog.orig.c">Original C</a>
|
||
<a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2F2018%2Fyang%2Findex.html">✓</a>
|
||
</div>
|
||
|
||
<!-- END: this line ends content from: inc/navbar.mid.html -->
|
||
<!-- START: this line starts content from: inc/before-content.default.html -->
|
||
|
||
<div class="content" id="content">
|
||
|
||
<!-- END: this line ends content from: inc/before-content.default.html -->
|
||
<!-- START: this line starts content for HTML phase 20 by: bin/output-index-author.sh via bin/md2html.sh -->
|
||
|
||
<!-- START: this line starts content generated by: bin/output-index-author.sh -->
|
||
|
||
<h2 id="author">Author:</h2>
|
||
<ul>
|
||
<li>Name: <a href="../../authors.html#Don_Yang">Don Yang</a><br>
|
||
Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)</li>
|
||
</ul>
|
||
|
||
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
|
||
|
||
<!-- END: this line ends content for HTML phase 20 by: bin/output-index-author.sh via bin/md2html.sh -->
|
||
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
|
||
|
||
<!-- BEFORE: 1st line of markdown file: 2018/yang/README.md -->
|
||
<h2 id="to-build">To build:</h2>
|
||
<pre><code> make</code></pre>
|
||
<h2 id="to-use">To use:</h2>
|
||
<p>The author suggested that after compilation one should look at the generated
|
||
files. For instance:</p>
|
||
<pre><code> less generated1.c
|
||
less generated2.c
|
||
less generated3.c</code></pre>
|
||
<h2 id="try">Try:</h2>
|
||
<pre><code> ./try.sh</code></pre>
|
||
<h2 id="judges-remarks">Judges’ remarks:</h2>
|
||
<p>Code should be readable in any direction! This tool will help you rotate your
|
||
code so you don’t have to stare at it sideways or even upside down. Rotating
|
||
this program left and recompiling will reveal other tools including a right rotate
|
||
and a shift program.</p>
|
||
<p>Strange things happen <a href="https://en.wikipedia.org/wiki/Wacky_Wednesday_(book)">when the world is upside
|
||
down</a>! It is entirely possible
|
||
that this remark is completely misleading.</p>
|
||
<p>What exactly does the shift program do?</p>
|
||
<p>Like a great sliding puzzle (hint) this entry has six more programs that will
|
||
reveal messages and one more tool that can be used to reveal the final message
|
||
hidden in the original source. All of these can be created using combinations
|
||
of <code>./left</code>, <code>./right</code> and <code>./shift</code> and the additionally generated programs.</p>
|
||
<h2 id="authors-remarks">Author’s remarks:</h2>
|
||
<h3 id="tools-usage">Tools’ usage:</h3>
|
||
<p><code>Nuko</code> is a text rotator: given some text in <code>stdin</code>, <code>Nuko</code> will write the
|
||
same text to <code>stdout</code>, but rotated 90 degrees counterclockwise.</p>
|
||
<pre><code> cc prog.c -o left
|
||
./left < input.txt > rotated_counterclockwise.txt</code></pre>
|
||
<p>Due to static memory allocation, only the first 1K columns by 1K rows
|
||
are rotated, the rest are silently ignored. But fear not, a separate
|
||
tool with dynamic memory allocation is included:</p>
|
||
<pre><code> ./left < prog.c > r1.c
|
||
cc r1.c -o right
|
||
./right < input.txt > rotated_clockwise.txt</code></pre>
|
||
<p>For variety, this second tool rotates clockwise instead of
|
||
counterclockwise. Also, it can handle files larger than 1024x1024,
|
||
depending on how much memory you have.</p>
|
||
<p>Of course we wouldn’t stop with just two rotations, if we continue to
|
||
rotate counterclockwise once more, we get another program. This
|
||
program outputs a single message to <code>stdout</code>, which is the name of the
|
||
series that <code>Nuko</code> came from.</p>
|
||
<pre><code> ./left < prog.c | ./left > r2.c
|
||
cc r2.c -o msg0
|
||
./msg0</code></pre>
|
||
<p>There is one final rotation, which produces a tool that removes
|
||
leading whitespaces:</p>
|
||
<pre><code> ./left < prog.c | ./left | ./left > r3.c
|
||
cc r3.c -o shift
|
||
./shift < input.txt > no_leading_space.txt</code></pre>
|
||
<p>Where this might be useful, besides ruining the formatting of certain
|
||
files, is that it completes the set of tools needed to solve the
|
||
puzzle that is embedded in <a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/prog.c">prog.c</a>.</p>
|
||
<h3 id="puzzle-box">Puzzle box:</h3>
|
||
<p>Notice how the edges of <a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/prog.c">prog.c</a> contain two notches. By rotating
|
||
<a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/prog.c">prog.c</a> and removing leading space, the code would be shifted one space
|
||
toward one of those notches (and create a new notch on the other
|
||
side). This shifted code behaves slightly different from the original
|
||
program. For example, here are two more messages that can be
|
||
produced:</p>
|
||
<pre><code> ./shift < prog.c | ./right > msg1.c && gcc msg1.c -o msg1 && ./msg1
|
||
./shift < prog.c | ./left > msg2.c && gcc msg2.c -o msg2 && ./msg2</code></pre>
|
||
<p>In total, there are 9 embedded strings that can be produced via a
|
||
sequence of rotates and shifts, one of which can be used to extract
|
||
the 10th final string from <a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/prog.c">prog.c</a>. The intent is to simulate those
|
||
wooden puzzle boxes that can be opened by pushing and shifting various
|
||
well-concealed seams. Thus, finding the correct sequence of rotates
|
||
and shifts is left as an exercise to the reader (but if you are really
|
||
lazy, just read the <a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/Makefile">Makefile</a>.</p>
|
||
<p>Source code for all the tools needed to solve this puzzle are embedded
|
||
in <a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/prog.c">prog.c</a>, all you need is a C compiler.</p>
|
||
<h3 id="features">Features</h3>
|
||
<ul>
|
||
<li><p>Code compiles when rotated 4 ways. This required a bit of patience to
|
||
achieve. Code still compiles even with one column of text shifted. This
|
||
required even more patience.</p></li>
|
||
<li><p>All rotated and shifted variants compile without warnings. This involves
|
||
various tweaks to satisfy cases where the compiler is overly protective, including
|
||
but not limited to the “1125” at line 4 as opposed to “1025”, to satisfy
|
||
<code>-Waggresive-loop-optimizations</code>.</p></li>
|
||
<li><p>CRC32 of the code is embedded in the code itself.</p></li>
|
||
<li><p>Process for writing <a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/prog.c">prog.c</a> is available in
|
||
<a href="obfuscation.html">obfuscation.html</a>.</p></li>
|
||
</ul>
|
||
<h3 id="compatibility">Compatibility:</h3>
|
||
<p><code>Nuko</code> and the rotated tools accept only ASCII files where each
|
||
character maps to exactly one byte. Also, end-of-line sequence is
|
||
assumed to be LF only, as opposed to CR-LF. All control characters
|
||
are treated like normal printable characters, so files containing tabs
|
||
will look weird after rotation, for example.</p>
|
||
<p><code>Nuko</code> has been verified to work with these compiler / OS combinations:</p>
|
||
<ul>
|
||
<li>gcc 4.8.4 on Linux</li>
|
||
<li>gcc 4.9.2 on Linux</li>
|
||
<li>gcc 6.1.0 on JS/Linux</li>
|
||
<li>gcc 6.3.0 on Linux</li>
|
||
<li>gcc 6.4.0 on Cygwin</li>
|
||
<li>clang 3.5.0 on Linux</li>
|
||
<li>clang 3.8.1 on Linux</li>
|
||
<li>clang 5.0.1 on Cygwin</li>
|
||
<li>tcc 0.9.25 on JS/Linux</li>
|
||
</ul>
|
||
<p><code>Nuko</code> compiles without warnings with all compilers above, even with
|
||
<code>-Wall -Wextra -pedantic</code> for gcc and clang.</p>
|
||
<h3 id="notice-to-those-who-wish-for-a-greater-challenge">NOTICE to those who wish for a greater challenge:</h3>
|
||
<p><strong>If you want a greater challenge, don’t read any further</strong>:
|
||
just try to understand the program without running the command below.</p>
|
||
<p>If you get stuck, come back and run the following command:</p>
|
||
<pre><code> ./msg9 < prog.c</code></pre>
|
||
<p>But what combinations will generate <code>./msg3</code>, <code>./msg4</code>, <code>./msg5</code>, <code>./msg6</code>,
|
||
<code>./msg7</code>, <code>./msg8</code> and finally <code>./msg9</code>?</p>
|
||
<p>For more hints try:</p>
|
||
<pre><code> make details</code></pre>
|
||
<p>And for the last word, try:</p>
|
||
<pre><code> make the_last_word</code></pre>
|
||
<!--
|
||
|
||
Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
|
||
|
||
You are free to share and adapt this file under the terms of this license:
|
||
|
||
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
|
||
|
||
For more information, see:
|
||
|
||
https://creativecommons.org/licenses/by-sa/4.0/
|
||
|
||
-->
|
||
<!-- AFTER: last line of markdown file: 2018/yang/README.md -->
|
||
|
||
<!-- END: this line ends content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
|
||
<!-- START: this line starts content for HTML phase 22 by: bin/output-index-inventory.sh via bin/md2html.sh -->
|
||
|
||
<!-- START: this line starts content generated by: bin/output-index-inventory.sh -->
|
||
|
||
<div id="inventory">
|
||
<h1 id="inventory-for-2018yang">Inventory for 2018/yang</h1>
|
||
</div>
|
||
<h2 id="primary-files">Primary files</h2>
|
||
<ul>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/prog.c">prog.c</a> - entry source code</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/Makefile">Makefile</a> - entry Makefile</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/prog.orig.c">prog.orig.c</a> - original source code</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/try.sh">try.sh</a> - script to try entry</li>
|
||
<li><a href="obfuscation.html">obfuscation.html</a> - JavaScript page with full recording of development</li>
|
||
</ul>
|
||
<h2 id="secondary-files">Secondary files</h2>
|
||
<ul>
|
||
<li><a href="2018_yang.tar.bz2">2018_yang.tar.bz2</a> - download entry tarball</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/README.md">README.md</a> - markdown source for this web page</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/.entry.json">.entry.json</a> - entry summary and manifest in JSON</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2018/yang/.path">.path</a> - directory path from top level directory</li>
|
||
<li><a href="index.html">index.html</a> - this web page</li>
|
||
</ul>
|
||
<hr style="width:10%;text-align:left;margin-left:0">
|
||
<h4>
|
||
Jump to: <a href="#">top</a>
|
||
</h4>
|
||
|
||
<!-- END: next line ends content generated by: bin/output-index-inventory.sh -->
|
||
|
||
<!-- END: this line ends content for HTML phase 22 by: bin/output-index-inventory.sh via bin/md2html.sh -->
|
||
<!-- START: this line starts content from: inc/after-content.default.html -->
|
||
|
||
</div>
|
||
|
||
<!-- END: this line ends content from: inc/after-content.default.html -->
|
||
<!-- START: this line starts content from: inc/footer.inventory.html -->
|
||
|
||
<!--
|
||
|
||
Copyright © 1984-2025 by Landon Curt Noll. All Rights Reserved.
|
||
|
||
You are free to share and adapt this file under the terms of this license:
|
||
|
||
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
|
||
|
||
For more information, see:
|
||
|
||
https://creativecommons.org/licenses/by-sa/4.0/
|
||
|
||
-->
|
||
|
||
<div class="footer">
|
||
|
||
<div id="copyright"><h3>Copyright © 1984-2025 by Landon Curt Noll:
|
||
<a href="https://creativecommons.org/faq/#what-does-some-rights-reserved-mean"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">Some Rights Reserved</a></h3>
|
||
<p>
|
||
This work is <b>licensed by Landon Curt Noll</b> under
|
||
<b><a href="https://creativecommons.org/licenses/by-sa/4.0/?ref=chooser-v1"
|
||
target="_blank"
|
||
rel="license noopener noreferrer"
|
||
style="display:inline-block;">CC BY-SA 4.0</a></b>.
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/cc.png"
|
||
alt="cc inside circle symbol">
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/by.png"
|
||
alt="person inside circle symbol">
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/sa.png"
|
||
alt="arrow looping back on itself inside circle symbol"><br>
|
||
You should <b>carefully review</b> the
|
||
<b><a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode.en"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">CC BY-SA 4.0 LEGAL CODE</a></b>
|
||
before using the licensed material.<br>
|
||
You may wish to review the
|
||
<b><a href="../../license.html"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">highlights of some of the key features and terms</a></b>
|
||
of <b>CC BY-SA 4.0</b>.<br>
|
||
</p>
|
||
</div>
|
||
|
||
<div id="coda"><h3>Coda</h3>
|
||
<p>
|
||
<a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2F2018%2Fyang%2Findex.html" rel="nofollow">Nu HTML check this web page</a><br>
|
||
<a href="#top">Jump to top</a> <a href="#content">Jump to Content</a> <a href="#inventory">Jump to Inventory</a><br>
|
||
</p>
|
||
</div>
|
||
|
||
</div>
|
||
|
||
<!-- END: this line ends content from: inc/footer.inventory.html -->
|
||
<!-- START: this line starts content from: inc/bottom.default.html -->
|
||
|
||
</body>
|
||
</html>
|
||
|
||
<!-- END: this line ends content from: inc/bottom.default.html -->
|