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<div class="headertitle"><div class="title">rot13.c File Reference</div></div>
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<p><a href="https://en.wikipedia.org/wiki/ROT13" target="_blank">ROT13</a> is a simple letter substitution cipher that replaces a letter with the 13th letter after it in the alphabet.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;stdio.h&gt;</code><br />
<code>#include &lt;string.h&gt;</code><br />
<code>#include &lt;assert.h&gt;</code><br />
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Include dependency graph for rot13.c:</div>
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Functions</h2></td></tr>
<tr class="memitem:aff3bdb59af9eabba91420f23eb01718c"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../de/dcf/rot13_8c.html#aff3bdb59af9eabba91420f23eb01718c">rot13</a> (char *s)</td></tr>
<tr class="memdesc:aff3bdb59af9eabba91420f23eb01718c"><td class="mdescLeft">&#160;</td><td class="mdescRight">for IO operations <a href="../../de/dcf/rot13_8c.html#aff3bdb59af9eabba91420f23eb01718c">More...</a><br /></td></tr>
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<tr class="memitem:aa8dca7b867074164d5f45b0f3851269d"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../de/dcf/rot13_8c.html#aa8dca7b867074164d5f45b0f3851269d">test</a> ()</td></tr>
<tr class="memdesc:aa8dca7b867074164d5f45b0f3851269d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Self-test implementations. <a href="../../de/dcf/rot13_8c.html#aa8dca7b867074164d5f45b0f3851269d">More...</a><br /></td></tr>
<tr class="separator:aa8dca7b867074164d5f45b0f3851269d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../de/dcf/rot13_8c.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a> ()</td></tr>
<tr class="memdesc:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Main function. <a href="../../de/dcf/rot13_8c.html#ae66f6b31b5ad750f1fe042a706a4e3d4">More...</a><br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p ><a href="https://en.wikipedia.org/wiki/ROT13" target="_blank">ROT13</a> is a simple letter substitution cipher that replaces a letter with the 13th letter after it in the alphabet. </p>
<p >ROT13 transforms a piece of text by examining its alphabetic characters and replacing each one with the letter 13 places further along in the alphabet, wrapping back to the beginning if necessary. A becomes N, B becomes O, and so on up to M, which becomes Z, then the sequence continues at the beginning of the alphabet: N becomes A, O becomes B, and so on to Z, which becomes M. </p><dl class="section author"><dt>Author</dt><dd><a href="https://github.com/j3r3mias" target="_blank">Jeremias Moreira Gomes</a> </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="ae66f6b31b5ad750f1fe042a706a4e3d4" name="ae66f6b31b5ad750f1fe042a706a4e3d4"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ae66f6b31b5ad750f1fe042a706a4e3d4">&#9670;&#160;</a></span>main()</h2>
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<td class="memname">int main </td>
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<td class="paramtype">void&#160;</td>
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<p>Main function. </p>
<dl class="section return"><dt>Returns</dt><dd>0 on exit </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 57</span> {</div>
<div class="line"><span class="lineno"> 58</span> <a class="code hl_function" href="../../de/dcf/rot13_8c.html#aa8dca7b867074164d5f45b0f3851269d">test</a>(); <span class="comment">// run self-test implementations</span></div>
<div class="line"><span class="lineno"> 59</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 60</span>}</div>
<div class="ttc" id="arot13_8c_html_aa8dca7b867074164d5f45b0f3851269d"><div class="ttname"><a href="../../de/dcf/rot13_8c.html#aa8dca7b867074164d5f45b0f3851269d">test</a></div><div class="ttdeci">static void test()</div><div class="ttdoc">Self-test implementations.</div><div class="ttdef"><b>Definition:</b> rot13.c:37</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#aff3bdb59af9eabba91420f23eb01718c">&#9670;&#160;</a></span>rot13()</h2>
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<td class="memname">void rot13 </td>
<td>(</td>
<td class="paramtype">char *&#160;</td>
<td class="paramname"><em>s</em></td><td>)</td>
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<p>for IO operations </p>
<p >for string operations for assert</p>
<p >Apply the ROT13 cipher </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">s</td><td>contains the string to be processed </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><span class="lineno"> 23</span> {</div>
<div class="line"><span class="lineno"> 24</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; s[i]; i++) {</div>
<div class="line"><span class="lineno"> 25</span> <span class="keywordflow">if</span> (s[i] &gt;= <span class="charliteral">&#39;A&#39;</span> &amp;&amp; s[i] &lt;= <span class="charliteral">&#39;Z&#39;</span>) {</div>
<div class="line"><span class="lineno"> 26</span> s[i] = <span class="charliteral">&#39;A&#39;</span> + ((s[i] - <span class="charliteral">&#39;A&#39;</span> + 13) % 26);</div>
<div class="line"><span class="lineno"> 27</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (s[i] &gt;= <span class="charliteral">&#39;a&#39;</span> &amp;&amp; s[i] &lt;= <span class="charliteral">&#39;z&#39;</span>) {</div>
<div class="line"><span class="lineno"> 28</span> s[i] = <span class="charliteral">&#39;a&#39;</span> + ((s[i] - <span class="charliteral">&#39;a&#39;</span> + 13) % 26);</div>
<div class="line"><span class="lineno"> 29</span> }</div>
<div class="line"><span class="lineno"> 30</span> } </div>
<div class="line"><span class="lineno"> 31</span>}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#aa8dca7b867074164d5f45b0f3851269d">&#9670;&#160;</a></span>test()</h2>
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<td class="memname">static void test </td>
<td>(</td>
<td class="paramtype">void&#160;</td>
<td class="paramname"></td><td>)</td>
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>Self-test implementations. </p>
<dl class="section return"><dt>Returns</dt><dd>void </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 37</span> {</div>
<div class="line"><span class="lineno"> 38</span> <span class="keywordtype">char</span> test_01[] = <span class="stringliteral">&quot;The more I C, the less I see.&quot;</span>;</div>
<div class="line"><span class="lineno"> 39</span> <a class="code hl_function" href="../../de/dcf/rot13_8c.html#aff3bdb59af9eabba91420f23eb01718c">rot13</a>(test_01);</div>
<div class="line"><span class="lineno"> 40</span> assert(strcmp(test_01, <span class="stringliteral">&quot;Gur zber V P, gur yrff V frr.&quot;</span>) == 0);</div>
<div class="line"><span class="lineno"> 41</span> </div>
<div class="line"><span class="lineno"> 42</span> <span class="keywordtype">char</span> test_02[] = <span class="stringliteral">&quot;Which witch switched the Swiss wristwatches?&quot;</span>;</div>
<div class="line"><span class="lineno"> 43</span> <a class="code hl_function" href="../../de/dcf/rot13_8c.html#aff3bdb59af9eabba91420f23eb01718c">rot13</a>(test_02);</div>
<div class="line"><span class="lineno"> 44</span> assert(strcmp(test_02, <span class="stringliteral">&quot;Juvpu jvgpu fjvgpurq gur Fjvff jevfgjngpurf?&quot;</span>) == 0);</div>
<div class="line"><span class="lineno"> 45</span> </div>
<div class="line"><span class="lineno"> 46</span> <span class="keywordtype">char</span> test_03[] = <span class="stringliteral">&quot;Juvpu jvgpu fjvgpurq gur Fjvff jevfgjngpurf?&quot;</span>;</div>
<div class="line"><span class="lineno"> 47</span> <a class="code hl_function" href="../../de/dcf/rot13_8c.html#aff3bdb59af9eabba91420f23eb01718c">rot13</a>(test_03);</div>
<div class="line"><span class="lineno"> 48</span> assert(strcmp(test_03, <span class="stringliteral">&quot;Which witch switched the Swiss wristwatches?&quot;</span>) == 0);</div>
<div class="line"><span class="lineno"> 49</span> </div>
<div class="line"><span class="lineno"> 50</span> printf(<span class="stringliteral">&quot;All tests have successfully passed!\n&quot;</span>);</div>
<div class="line"><span class="lineno"> 51</span>}</div>
<div class="ttc" id="arot13_8c_html_aff3bdb59af9eabba91420f23eb01718c"><div class="ttname"><a href="../../de/dcf/rot13_8c.html#aff3bdb59af9eabba91420f23eb01718c">rot13</a></div><div class="ttdeci">void rot13(char *s)</div><div class="ttdoc">for IO operations</div><div class="ttdef"><b>Definition:</b> rot13.c:23</div></div>
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