release winning entries of IOCCC28 under the year 2024

Congratulations to: * 2024/anders - Prize in sound coding - layered music generator * 2024/burton - Prize in pentagrammatology - wordle hard mode solver * 2024/cable1 - Prize in bot talk - LLM inference engine * 2024/cable2 - Prize in murky waters - salmon recipe * 2024/carlini - Prize in perfect timing - Intel 4004 emulation * 2024/codemeow - Prize in tray planting - bonsai generator * 2024/endoh1 - Prize in patient pointillism - slow ray tracer in CPP * 2024/endoh2 - Prize in solid body physics - rotating rigid body simulation * 2024/ferguson1 - Prize in diabolical logistics - Oregon trail pact with the devil * 2024/ferguson2 - Prize in yil-tas - Navajo code talker translator * 2024/howe - Nice accent eh-ward - mini vi * 2024/kramer - Prize in linguistic arithmetic - natural language numerical calculator * 2024/kurdyukov1 - Prize in phased periodicity - phase of the Moon * 2024/kurdyukov2 - Prize in art restoration - JPEG artifact removal * 2024/kurdyukov3 - Prize in virtual quietus - gaming VM and doom * 2024/kurdyukov4 - Prize in embiggening - encode without literals * 2024/maffiodo - Prize in creative interpretation - Jav\*script interpreter * 2024/mills - Prize in ℤ₃ - Infocom v3 story interpreter * 2024/stedolan - Best one liner - icon from MD5 * 2024/straadt - Prize in imitative rebooting - OpenRISC CPU and Linux * 2024/tmarrec - Prize in cyclonic coding - 3D tornado simulation * 2024/tompng - Prize in quasi bijection - vortex encryptor decryptor * 2024/weaver - Sur prize - rickroll Ran `make update` to perform the above. new file: 2024/burton/.entry.json
2025-08-02 14:43:07 -07:00
1 parent 10512e6c79
commit 09750f8899
@@ -0,0 +1,97 @@
+{
+    "no_comment" : "mandatory comment: because comments were removed from the original JSON spec",
+    "entry_JSON_format_version" : "1.2 2024-09-25",
+    "award" : "Best one liner",
+    "year" : 2024,
+    "dir" : "stedolan",
+    "entry_id" : "2024_stedolan",
+    "title" : "icon",
+    "abstract" : "icon from MD5",
+    "author_set" : [
+        {
+            "author_handle" : "Stephen_Dolan"
+        }
+    ],
+    "manifest" : [
+        {
+            "file_path" : "prog.c",
+            "inventory_order" : 20,
+            "OK_to_edit" : true,
+            "display_as" : "c",
+            "display_via_github" : true,
+            "entry_text" : "entry source code"
+        },
+        {
+            "file_path" : "Makefile",
+            "inventory_order" : 30,
+            "OK_to_edit" : true,
+            "display_as" : "makefile",
+            "display_via_github" : true,
+            "entry_text" : "entry Makefile"
+        },
+        {
+            "file_path" : "prog.orig.c",
+            "inventory_order" : 50,
+            "OK_to_edit" : false,
+            "display_as" : "c",
+            "display_via_github" : true,
+            "entry_text" : "original source code"
+        },
+        {
+            "file_path" : "try.sh",
+            "inventory_order" : 100,
+            "OK_to_edit" : true,
+            "display_as" : "shellscript",
+            "display_via_github" : true,
+            "entry_text" : "script to try entry"
+        },
+        {
+            "file_path" : "2024_stedolan.tar.bz2",
+            "inventory_order" : 1415926535,
+            "OK_to_edit" : false,
+            "display_as" : "tbz2",
+            "display_via_github" : false,
+            "entry_text" : "download entry tarball"
+        },
+        {
+            "file_path" : ".entry.json",
+            "inventory_order" : 4000000000,
+            "OK_to_edit" : true,
+            "display_as" : "json",
+            "display_via_github" : true,
+            "entry_text" : "entry summary and manifest in JSON"
+        },
+        {
+            "file_path" : ".gitignore",
+            "inventory_order" : 4000000000,
+            "OK_to_edit" : true,
+            "display_as" : "gitignore",
+            "display_via_github" : true,
+            "entry_text" : "list of files that should not be committed under git"
+        },
+        {
+            "file_path" : ".path",
+            "inventory_order" : 4000000000,
+            "OK_to_edit" : false,
+            "display_as" : "path",
+            "display_via_github" : false,
+            "entry_text" : "directory path from top level directory"
+        },
+        {
+            "file_path" : "README.md",
+            "inventory_order" : 4000000000,
+            "OK_to_edit" : true,
+            "display_as" : "markdown",
+            "display_via_github" : true,
+            "entry_text" : "markdown source for this web page"
+        },
+        {
+            "file_path" : "index.html",
+            "inventory_order" : 4294967295,
+            "OK_to_edit" : false,
+            "display_as" : "html",
+            "display_via_github" : false,
+            "entry_text" : "this web page"
+        }
+    ]
+}
@@ -0,0 +1 @@
+*.pbm
@@ -0,0 +1 @@
+2024/stedolan
@@ -0,0 +1,218 @@
+#!/usr/bin/env make
+#
+# 2024/stedolan
+
+#############################
+# shell used by this Makefile
+#############################
+
+SHELL= bash
+
+
+#######################
+# common tool locations
+#######################
+
+include ../../var.mk
+
+
+#####################
+# C compiler settings
+#####################
+
+# Common C compiler warnings to silence
+#
+# Warnings disabled:
+#
+#   for 'main (){...}'                  : -Wno-implicit-int -Wno-strict-prototypes
+#   for 'long z,x,G;'                   : -Wno-missing-variable-declarations
+#   for perfectly sensible expressions  : -Wno-parentheses
+#   for '%lx' into a signed long        : -Wno-format
+#
+CSILENCE= -Wno-implicit-int -Wno-shift-op-parentheses -Wno-strict-prototypes \
+	-Wno-format -Wno-parentheses
+
+# Attempt to silence unknown warning options
+#
+CUNKNOWN= -Wno-unknown-warning-option
+
+# Common C compiler warning flags
+#
+# NOTE: The addition of -pedantic to CWARN is a challenge that
+#       You may wish to avoid if it proves too problematic.
+#       There is NO penalty for removing -pedantic from CWARN.
+#
+CWARN= -Wall -Wextra -pedantic ${CSILENCE} ${CUNKNOWN}
+
+# Compiler standard
+#
+CSTD= -std=gnu17
+
+# Compiler bit architecture
+#
+# Example for 32-bitness: ARCH= -m32
+# Example for 64-bitness: ARCH= -m64
+#
+# NOTE: Normally one should NOT specify a specific architecture.
+#
+ARCH=
+
+# Defines that are needed to compile
+#
+# Example: -Dfoo -Dbar=baz
+#
+CDEFINE=
+
+# Include files that are needed to compile
+#
+# Example: CINCLUDE= -include stdio.h
+#
+CINCLUDE= -include stdio.h
+
+# Other flags to pass to the C compiler
+#
+# Example: COTHER= -fno-math-errno
+#
+COTHER=
+
+# Optimization
+#
+# NOTE: Feel free to change the level of compiler optimization.
+#       The "-O3" is just a friendly default you might wish to try.
+#
+# Example: OPT= -O0 -g
+#
+OPT= -O3
+
+# Default flags for ANSI C compilation
+#
+CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${COTHER} ${OPT}
+
+# Libraries needed to build
+#
+# Example: LDFLAGS= -lncurses -lm
+#
+LDFLAGS=
+
+# C compiler to use
+#
+# NOTE: The IOCCC Judges recommend you leave CC as just "cc"
+#       and NOT set it to clang, or gcc, or something else
+#       unless you have a STRONG reason to do so.
+#
+#       Setting CC to something other than "cc" makes your
+#       code less portable to those who do not have your
+#       particular C compiler.  **hint**
+#
+#       If you want to test your code with a particular C compiler,
+#       use the make command line.  For example:
+#
+#           make all CC=clang
+#           make all CC=gcc
+#
+CC= cc
+
+# Compiler add-ons or replacements for clang only
+#
+ifeq "$(findstring $(CLANG),${CC})" "$(CLANG)"
+#
+# NOTE: This code is only invoked when CC is "clang"
+#       such as when you use the make command line:
+#
+#           make all CC=clang
+#
+CSILENCE+= -Wno-format -Wno-implicit-int -Wno-missing-variable-declarations \
+	-Wno-poison-system-directories -Wno-shift-op-parentheses \
+	-Wno-strict-prototypes
+#
+CWARN+= -Weverything
+#
+endif
+
+# Specific add-ons or replacements for gcc only
+#
+ifeq "$(findstring $(GCC),${CC})" "$(GCC)"
+#
+# NOTE: This code is only invoked when CC is "gcc"
+#       such as when you use the make command line:
+#
+#    make all CC=gcc
+#
+CSILENCE+=
+#
+CWARN+=
+#
+endif
+
+
+###########################################
+# Special Makefile variables for this entry
+###########################################
+
+ENTRY= prog
+PROG= ${ENTRY}
+#
+OBJ= ${PROG}.o
+TARGET= ${PROG}
+#
+ALT_OBJ=
+ALT_TARGET=
+
+# list any data files supplied with your submission
+#
+# Example: DATA= curds whey
+#
+DATA=
+
+
+#################
+# build the entry
+#################
+
+all: data ${TARGET}
+	@${TRUE}
+
+.PHONY: all alt data everything clean clobber
+
+# how to compile
+#
+${PROG}: ${PROG}.c
+	${CC} ${CFLAGS} ${PROG}.c -o $@ ${LDFLAGS}
+
+# alternative executable
+#
+alt: data ${ALT_TARGET}
+	@${TRUE}
+
+${PROG}.alt: ${PROG}.alt.c
+	${CC} ${CFLAGS} ${PROG}.alt.c -o $@ ${LDFLAGS}
+
+# data files
+#
+data: ${DATA}
+	@${TRUE}
+
+# both all and alt
+#
+everything: all alt
+	@${TRUE}
+
+
+###############
+# utility rules
+###############
+#
+clean:
+	${RM} -f ${OBJ} ${ALT_OBJ}
+
+clobber: clean
+	${RM} -f ${TARGET} ${ALT_TARGET}
+	${RM} -rf *.dSYM
+	${RM} -f prog.pbm try.pbm
+
+
+######################################
+# optional include of 1337 hacker rulz
+######################################
+
+-include 1337.mk ../1337.mk ../../1337.mk
@@ -0,0 +1,109 @@
+## To build:
+
+``` <!---sh-->
+    make all
+```
+
+
+## To use:
+
+``` <!---sh-->
+    echo {10-hex-digits} | ./prog > out.pbm
+```
+
+
+## Try:
+
+``` <!---sh-->
+    md5sum prog.c | ./prog | display -
+```
+
+
+## Judges' remarks:
+
+There are no magic numbers in the program, and bits of the input map to pixels of the output
+in a regular way, yet it outputs a nice icon for itself, if given the MD5 hash of its own source. How?
+
+
+## Author's remarks:
+
+This program is a decoder for a very compact icon format, producing 80x80
+pixel **pbm images** based on small bitmapped icons:
+
+``` <!---sh-->
+    echo faf6bdafe6 | ./prog | display -   # calendar
+    echo f843928fe0 | ./prog | display -   # mail
+    echo f0b42d0bd8 | ./prog | display -   # battery
+    echo f39ce33bc0 | ./prog | display -   # 1
+    echo f0aced1bc0 | ./prog | display -   # 2
+    echo f1b4ed1bc0 | ./prog | display -   # 3
+    echo 4010881098 | ./prog | display -   # ?
+    echo c6018c7398 | ./prog | display -   # !
+    echo de848d2c3c | ./prog | display -   # the tetrominos
+```
+
+**NOTE**: The use of `| display -` is optional.  If omitted,
+just view the resulting output in a terminal with a small font size.
+
+**NOTE**: Else if do not have ImageMagick's `display(1)` tool installed
+the use **pbm image** viewing tool of your choice.
+
+Effort has been made to reduce the size of the program text to a single
+longish line (135 characters, including newline). Regrettably, this left no
+space in which to store the program's own icon, a picture of a computer
+screen displaying 'C'.
+
+Accordingly, the program's icon is instead stored in the program's MD5 hash:
+
+``` <!---sh-->
+    md5sum prog.c | ./prog | display -
+```
+
+**NOTE**: On machines without `md5sum(1)`, try `md5` or `openssl md5 -r`.
+
+
+### Notes
+
+  - While terseness was preferred over obscurity, this program hopefully
+    still lives down to IOCCC's usual standards of clarity.
+
+    The program should be readable to any C programmer familiar with its
+    less common operators, including French-quoted literals (`<<5>>`), the
+    interrobang (`?!`) and the wink (`^-`).
+
+  - To fit on one line, the program commits two anachronistic sins: it
+    assumes an implicit `int` return type for `main`, and it uses several
+    stdlib functions without including the relevant header.
+
+    It can be compiled by switching to `-std=c89` (remembering a time when
+    such crimes were let off with a warning), or by covering up the crimes
+    with `-Dmain='int main' -include stdio.h`, at which point it is valid
+    under any version of C.
+
+  - Even with these compiler options, Clang and GCC with `-Wall` also issue
+    a warning complaining that the program correctly uses weird parts of
+    the C operator precedence table. No apology is made for this one.
+
+  - Several variants of this program were considered. Several.
+
+  - The icon format is compressed, not just bit-packed: there are more
+    pixels in the output than bits in the input.
+
+  - By an astonishing coincidence, the number of bits in the input format
+    is approximately the log2 of the number of MD5 evaluations that a
+    five-year-old GPU can do in an hour.
+
+
+<!--
+
+    Copyright © 1984-2025 by Landon Curt Noll and Leonid A. Broukhis.  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/
+
+-->
@@ -0,0 +1,648 @@
+<!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>2024/stedolan - Best one liner</title>
+<link rel="icon" type="image/x-icon" href="../../favicon.ico">
+<meta name="description" content="2024 IOCCC entry stedolan - Best one liner">
+<meta name="keywords" content="IOCCC, 2024, IOCCC 2024, IOCCC entry, stedolan, Best one liner">
+</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: 2024/stedolan/README.md -->
+<!-- -->
+
+<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
+<!-- !!! Do not modify this web page, instead modify the file: 2024/stedolan/README.md !!! -->
+<!-- !!! Do not modify this web page, instead modify the file: 2024/stedolan/README.md !!! -->
+<!-- !!! Do not modify this web page, instead modify the file: 2024/stedolan/README.md !!! -->
+<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
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+      <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>2024/stedolan - Best one liner</h2>
+  <h3>icon from MD5</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="../mills/index.html">&larr; 2024/mills</a>
+  <a class="Left" href="../index.html">&uarr; 2024 &uarr;</a>
+  <a class="Left" href="../straadt/index.html">2024/straadt &rarr;</a>
+  <a class="Right" href="https://github.com/ioccc-src/winner/blob/master/2024/stedolan/prog.c">C code</a>
+  <a class="Right" href="https://github.com/ioccc-src/winner/blob/master/2024/stedolan/Makefile">Makefile</a>
+  <a class="Right" href="#inventory">Inventory</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2F2024%2Fstedolan%2Findex.html">&#x2713;</a>
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+    <div class="content" id="content">
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+<!-- START: this line starts content generated by: bin/output-index-author.sh -->
+
+<h2 id="author">Author:</h2>
+<ul>
+<li>Name: <a href="../../authors.html#Stephen_Dolan">Stephen Dolan</a><br>
+Location: <a href="../../location.html#IE">IE</a> - <em>Republic of Ireland</em> (<em>Ireland</em>)</li>
+</ul>
+
+<!-- END: next line ends content generated by: bin/output-index-author.sh -->
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+
+<!-- BEFORE: 1st line of markdown file: 2024/stedolan/README.md -->
+<h2 id="to-build">To build:</h2>
+<pre><code>    make all</code></pre>
+<h2 id="to-use">To use:</h2>
+<pre><code>    echo {10-hex-digits} | ./prog &gt; out.pbm</code></pre>
+<h2 id="try">Try:</h2>
+<pre><code>    md5sum prog.c | ./prog | display -</code></pre>
+<h2 id="judges-remarks">Judges’ remarks:</h2>
+<p>There are no magic numbers in the program, and bits of the input map to pixels of the output
+in a regular way, yet it outputs a nice icon for itself, if given the MD5 hash of its own source. How?</p>
+<h2 id="authors-remarks">Author’s remarks:</h2>
+<p>This program is a decoder for a very compact icon format, producing 80x80
+pixel <strong>pbm images</strong> based on small bitmapped icons:</p>
+<pre><code>    echo faf6bdafe6 | ./prog | display -   # calendar
+    echo f843928fe0 | ./prog | display -   # mail
+    echo f0b42d0bd8 | ./prog | display -   # battery
+    echo f39ce33bc0 | ./prog | display -   # 1
+    echo f0aced1bc0 | ./prog | display -   # 2
+    echo f1b4ed1bc0 | ./prog | display -   # 3
+    echo 4010881098 | ./prog | display -   # ?
+    echo c6018c7398 | ./prog | display -   # !
+    echo de848d2c3c | ./prog | display -   # the tetrominos</code></pre>
+<p><strong>NOTE</strong>: The use of <code>| display -</code> is optional. If omitted,
+just view the resulting output in a terminal with a small font size.</p>
+<p><strong>NOTE</strong>: Else if do not have ImageMagick’s <code>display(1)</code> tool installed
+the use <strong>pbm image</strong> viewing tool of your choice.</p>
+<p>Effort has been made to reduce the size of the program text to a single
+longish line (135 characters, including newline). Regrettably, this left no
+space in which to store the program’s own icon, a picture of a computer
+screen displaying ‘C’.</p>
+<p>Accordingly, the program’s icon is instead stored in the program’s MD5 hash:</p>
+<pre><code>    md5sum prog.c | ./prog | display -</code></pre>
+<p><strong>NOTE</strong>: On machines without <code>md5sum(1)</code>, try <code>md5</code> or <code>openssl md5 -r</code>.</p>
+<h3 id="notes">Notes</h3>
+<ul>
+<li><p>While terseness was preferred over obscurity, this program hopefully
+still lives down to IOCCC’s usual standards of clarity.</p>
+<p>The program should be readable to any C programmer familiar with its
+less common operators, including French-quoted literals (<code>&lt;&lt;5&gt;&gt;</code>), the
+interrobang (<code>?!</code>) and the wink (<code>^-</code>).</p></li>
+<li><p>To fit on one line, the program commits two anachronistic sins: it
+assumes an implicit <code>int</code> return type for <code>main</code>, and it uses several
+stdlib functions without including the relevant header.</p>
+<p>It can be compiled by switching to <code>-std=c89</code> (remembering a time when
+such crimes were let off with a warning), or by covering up the crimes
+with <code>-Dmain='int main' -include stdio.h</code>, at which point it is valid
+under any version of C.</p></li>
+<li><p>Even with these compiler options, Clang and GCC with <code>-Wall</code> also issue
+a warning complaining that the program correctly uses weird parts of
+the C operator precedence table. No apology is made for this one.</p></li>
+<li><p>Several variants of this program were considered. Several.</p></li>
+<li><p>The icon format is compressed, not just bit-packed: there are more
+pixels in the output than bits in the input.</p></li>
+<li><p>By an astonishing coincidence, the number of bits in the input format
+is approximately the log2 of the number of MD5 evaluations that a
+five-year-old GPU can do in an hour.</p></li>
+</ul>
+<!--
+
+    Copyright © 1984-2025 by Landon Curt Noll and Leonid A. Broukhis.  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)
+
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+
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+
+<div id="inventory">
+<h1 id="inventory-for-2024stedolan">Inventory for 2024/stedolan</h1>
+</div>
+<h2 id="primary-files">Primary files</h2>
+<ul>
+<li><a href="https://github.com/ioccc-src/winner/blob/master/2024/stedolan/prog.c">prog.c</a> - entry source code</li>
+<li><a href="https://github.com/ioccc-src/winner/blob/master/2024/stedolan/Makefile">Makefile</a> - entry Makefile</li>
+<li><a href="https://github.com/ioccc-src/winner/blob/master/2024/stedolan/prog.orig.c">prog.orig.c</a> - original source code</li>
+<li><a href="https://github.com/ioccc-src/winner/blob/master/2024/stedolan/try.sh">try.sh</a> - script to try entry</li>
+</ul>
+<h2 id="secondary-files">Secondary files</h2>
+<ul>
+<li><a href="2024_stedolan.tar.bz2">2024_stedolan.tar.bz2</a> - download entry tarball</li>
+<li><a href="https://github.com/ioccc-src/winner/blob/master/2024/stedolan/README.md">README.md</a> - markdown source for this web page</li>
+<li><a href="https://github.com/ioccc-src/winner/blob/master/2024/stedolan/.entry.json">.entry.json</a> - entry summary and manifest in JSON</li>
+<li><a href="https://github.com/ioccc-src/winner/blob/master/2024/stedolan/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
+<li><a href=".path">.path</a> - directory path from top level directory</li>
+<li><a href="index.html">index.html</a> - this web page</li>
+</ul>
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+<h4>
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+    </div>
+
+    <div id="coda"><h3>Coda</h3>
+	<p>
+	<a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2F2024%2Fstedolan%2Findex.html" rel="nofollow">Nu HTML check this web page</a><br>
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@@ -0,0 +1 @@
+long z,x,G;main(){for(puts("P1\n80 80"),scanf("%10lx",&G);3-z/2160;x=++z%81/8-5)putchar(5>x?!(16>>(x^-(x<1))+1&G<<5>>z/648*5)^49:10);}
@@ -0,0 +1 @@
+long z,x,G;main(){for(puts("P1\n80 80"),scanf("%10lx",&G);3-z/2160;x=++z%81/8-5)putchar(5>x?!(16>>(x^-(x<1))+1&G<<5>>z/648*5)^49:10);}
@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate 2024/stedolan
+
+# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
+# this way allows us to have the user specify a different compiler in an easy way.
+#
+[[ -z "$CC" ]] && CC="cc"
+
+# make sure the program has been built
+#
+make CC="$CC" all >/dev/null || exit 1
+
+# clear the screen
+#
+clear
+
+# try the program
+#
+read -r -n 1 -p "Press any key to run: md5sum prog.c | ./prog > prog.pbm: "
+echo 1>&2
+echo 1>&2
+rm -f prog.pbm
+md5sum prog.c | ./prog > prog.pbm
+echo "Now open prog.pbm in a graphics viewer in a separate window." 1>&2
+echo 1>&2
+
+# try the program again
+#
+read -r -n 1 -p "Press any key to run: md5sum try.sh | ./prog > try.pbm: "
+echo 1>&2
+echo 1>&2
+rm -f try.pbm
+md5sum try.sh | ./prog > try.pbm
+echo "Now open try.pbm in a graphics viewer in a separate window." 1>&2
+echo 1>&2
				`@@ -0,0 +1 @@`
				`long z,x,G;main(){for(puts("P1\n80 80"),scanf("%10lx",&G);3-z/2160;x=++z%81/8-5)putchar(5>x?!(16>>(x^-(x<1))+1&G<<5>>z/648*5)^49:10);}`