|
1 | 1 | <?php |
2 | 2 | if ( isset($_POST['secret']) && $_POST['secret'] == '42' ) { |
3 | 3 | setCookie('secret', '42', time() + 15 * 3600 * 24); |
| 4 | + header("Location: index.php"); |
4 | 5 | } else if ( !isset($_COOKIE['secret']) || $_COOKIE['secret'] != '42' ) { |
5 | 6 | ?> |
6 | 7 | <body style="font-family: Courier,monospace; width: 80%; max-width:500px;margin-left: auto; margin-right: auto;"> |
|
30 | 31 | return; |
31 | 32 | } |
32 | 33 |
|
33 | | -$stdout = False; |
34 | | -$stderr = False; |
35 | | -$return_value = False; |
| 34 | +use \Tsugi\Core\LTIX; |
| 35 | +use \Tsugi\UI\Output; |
36 | 36 |
|
37 | | -if ( isset($_POST['code']) ) { |
38 | | -$descriptorspec = array( |
39 | | - 0 => array("pipe", "r"), // stdin is a pipe that the child will read from |
40 | | - 1 => array("pipe", "w"), // stdout is a pipe that the child will write to |
41 | | - 2 => array("pipe", "w") // stderr is a file to write to |
42 | | -); |
43 | | - |
44 | | -$cwd = '/tmp'; |
45 | | -$env = array( |
46 | | - 'some_option' => 'aeiou', |
47 | | - 'PATH' => '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin', |
48 | | -); |
49 | | - |
50 | | -$process = proc_open('gcc -ansi -x c -c -', $descriptorspec, $pipes, $cwd, $env); |
51 | | - |
52 | | -if (is_resource($process)) { |
53 | | - // $pipes now looks like this: |
54 | | - // 0 => writeable handle connected to child stdin |
55 | | - // 1 => readable handle connected to child stdout |
56 | | - // Any error output will be appended to /tmp/error-output.txt |
57 | | - |
58 | | - fwrite($pipes[0], $_POST['code']); |
59 | | - fclose($pipes[0]); |
60 | | - |
61 | | - $stdout = stream_get_contents($pipes[1]); |
62 | | - fclose($pipes[1]); |
63 | | - $stderr = stream_get_contents($pipes[2]); |
64 | | - fclose($pipes[2]); |
65 | | - |
66 | | - // It is important that you close any pipes before calling |
67 | | - // proc_close in order to avoid a deadlock |
68 | | - $return_value = proc_close($process); |
69 | | - |
70 | | -} |
71 | | -} |
72 | | - |
73 | | -?><html> |
74 | | -<head> |
75 | | -<link href="static/codemirror-5.62.0/lib/codemirror.css" rel="stylesheet"/> |
76 | | -<style> |
77 | | -body { |
78 | | - font-family: Courier, monospace; |
79 | | -} |
80 | | -</style> |
81 | | -</head> |
82 | | -<body> |
83 | | -<h1>C Programming for Everybody (CC4E)</h1> |
84 | | -<p> |
85 | | -This web site will teach C programming and Computer Architecture using the 1978 |
86 | | -<a href="https://en.wikipedia.org/wiki/The_C_Programming_Language" target="_blank"> |
87 | | -C Programming</a> book by |
88 | | -<a href="https://en.wikipedia.org/wiki/Brian_Kernighan" title="Brian Kernighan">Brian Kernighan</a> |
89 | | -and |
90 | | -<a href="https://en.wikipedia.org/wiki/Dennis_Ritchie" title="Dennis Ritchie">Dennis Ritchie</a>. |
91 | | -</p> |
| 37 | +require_once "top.php"; |
| 38 | +require_once "nav.php"; |
| 39 | +?> |
| 40 | +<div id="container"> |
| 41 | +<div style="margin-left: 10px; float:right"> |
| 42 | +<iframe width="400" height="225" src="https://www.youtube.com/embed/sQwkC5PBTfk?rel=0" frameborder="0" allowfullscreen></iframe> |
| 43 | +</div> |
| 44 | +<h1>C Programming for Everybody</h1> |
92 | 45 | <p> |
93 | | -You can write and compile some C code below. |
| 46 | +This web site is dedicated to understanding computer architecture and low-level programming |
| 47 | +by studying the "classic" version of |
| 48 | +the C Programming language from the 1978 book written by Brian Kernighan and Dennis Ritchie. |
94 | 49 | </p> |
95 | 50 | <p> |
96 | | -<?php |
97 | | -if ( $return_value !== False ) { |
98 | | - if ( $return_value === 0 ) { |
99 | | - echo('<p style="color:green;">Your code compiled successfully. </p>'."\n"); |
100 | | - } else { |
101 | | - echo('<pre style="color:white; background-color:black;">'."\n"); |
102 | | - echo("$ gcc -ansi hello.c\n"); |
103 | | - if ( strlen($stdout) > 0 ) echo(htmlentities($stdout)); |
104 | | - if ( strlen($stderr) > 0 ) echo(htmlentities($stderr)); |
105 | | - echo("\n</pre>\n"); |
106 | | - } |
107 | | -} |
108 | | -?> |
109 | | -<form method="post"> |
110 | | -<textarea id="mycode" name="code" style="border: 1px black solid;"> |
111 | | -<?php |
112 | | -if ( isset($_POST['code']) ) { |
113 | | - echo(htmlentities($_POST['code'])); |
114 | | -} else { |
115 | | -?> |
116 | | -#include <stdio.h> |
117 | | - |
118 | | -main() { |
119 | | - printf("Hello World\n"); |
120 | | -} |
121 | | -<?php } ?> |
122 | | -</textarea> |
123 | | -<input type="submit" value="Compile"> |
124 | | -</form> |
125 | | -Executing code needs more security and is coming soon. |
| 51 | +The K&R book places the reader in the middle of the 1970's transition from |
| 52 | +a hardware-centered computer science to a focus on writing portable and efficient |
| 53 | +software. C was used to develop operating systems like Unix, Minix, and Linux and |
| 54 | +progamming languages like Java, JavaScript, and Python. |
126 | 55 | </p> |
127 | 56 | <p> |
128 | | -This book is the foundation of all modern computing and advanced the notion that one programming language |
129 | | -could be used to develop high performance systems-level code that was portable across multiple |
130 | | -computer architectures. In a sense it is like a |
131 | | -<a href="https://en.wikipedia.org/wiki/Rosetta_Stone" target="_blank">Rosetta Stone</a> |
132 | | -that connects the early hardware-centered phase of computing |
133 | | -with today's software-centered phase of computing. |
134 | | -Since the book for this course is out of print, otherwise unavailable, not available in an accessable format, |
135 | | -and being presented in a historical context, we are providing a copy to |
136 | | -be used in conjunction with this course under |
137 | | -<a href="https://en.wikipedia.org/wiki/Fair_use" target="_blank">Fair Use</a>. |
| 57 | +This site uses <a href="http://www.tsugi.org" target="_blank">Tsugi</a> |
| 58 | +framework to embed a learning management system into this site and |
| 59 | +provide the autograders. |
| 60 | +If you are interested in collaborating |
| 61 | +to build these kinds of sites for yourself, please see the |
| 62 | +<a href="http://www.tsugi.org" target="_blank">tsugi.org</a> website and/or |
| 63 | +contact me. |
138 | 64 | </p> |
139 | 65 | <p> |
140 | | -Here is our copy of the |
141 | | -<a href="book/chap01.md">book in progress</a> for your use in this course. |
142 | | -You can help us recover and present this historically important book in |
143 | | -<a href="https://github.com/csev/cc4e/" target="_blank">Github</a>. |
| 66 | +And yes, Dr. Chuck actually has a race car - it is called the |
| 67 | +<a href="https://www.sakaiger.com/sakaicar/" target=_blank">SakaiCar</a>. |
| 68 | +He races in a series called |
| 69 | +<a href="https://www.24hoursoflemons.com" target="_blank">24 Hours of Lemons</a>. |
144 | 70 | </p> |
145 | | -<script type="text/javascript" src="static/codemirror-5.62.0/lib/codemirror.js"></script> |
146 | | -<script type="text/javascript" src="static/codemirror-5.62.0/mode/clike/clike.js"></script> |
147 | | -<script> |
148 | | - var myTextarea = document.getElementById("mycode"); |
149 | | - var editor = CodeMirror.fromTextArea(myTextarea, { |
150 | | - lineNumbers: true, |
151 | | - matchBrackets: true, |
152 | | - mode: "text/x-csrc" |
153 | | - }); |
154 | | -</script> |
155 | | -</body> |
| 71 | +<!-- |
| 72 | +<?php |
| 73 | +echo(Output::safe_var_dump($_SESSION)); |
| 74 | +var_dump($USER); |
| 75 | +?> |
| 76 | +--> |
| 77 | +</div> |
| 78 | +<?php $OUTPUT->footer(); |
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