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<div class="headertitle"><div class="title">roman_numerals_to_decimal.c File Reference</div></div>
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<p>Conversion of <a href="https://en.wikipedia.org/wiki/Roman_numerals" target="_blank">roman numerals</a> to decimal.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;assert.h&gt;</code><br />
<code>#include &lt;stdio.h&gt;</code><br />
<code>#include &lt;string.h&gt;</code><br />
</div><div class="textblock"><div class="dynheader">
Include dependency graph for roman_numerals_to_decimal.c:</div>
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Functions</h2></td></tr>
<tr class="memitem:a95b7915cdb0df66a0aae7b769d3bbf88"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a95b7915cdb0df66a0aae7b769d3bbf88">symbol</a> (char symbol)</td></tr>
<tr class="memdesc:a95b7915cdb0df66a0aae7b769d3bbf88"><td class="mdescLeft">&#160;</td><td class="mdescRight">for assert <br /></td></tr>
<tr class="separator:a95b7915cdb0df66a0aae7b769d3bbf88"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1e86fb4466b6a175b910fa19c4a6ea03"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a1e86fb4466b6a175b910fa19c4a6ea03">roman_to_decimal</a> (char input[])</td></tr>
<tr class="memdesc:a1e86fb4466b6a175b910fa19c4a6ea03"><td class="mdescLeft">&#160;</td><td class="mdescRight">Converts roman numerals into a decimal number. <br /></td></tr>
<tr class="separator:a1e86fb4466b6a175b910fa19c4a6ea03"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa8dca7b867074164d5f45b0f3851269d"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../dd/de6/roman__numerals__to__decimal_8c.html#aa8dca7b867074164d5f45b0f3851269d">test</a> ()</td></tr>
<tr class="memdesc:aa8dca7b867074164d5f45b0f3851269d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Self-test implementations. <br /></td></tr>
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<tr class="memitem:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../dd/de6/roman__numerals__to__decimal_8c.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a> ()</td></tr>
<tr class="memdesc:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Main function. <br /></td></tr>
<tr class="separator:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Conversion of <a href="https://en.wikipedia.org/wiki/Roman_numerals" target="_blank">roman numerals</a> to decimal. </p>
<p>Roman numerals are an ancient Roman numeral system consisting of the symbols I, V, X, <a class="el" href="../../df/db3/struct_l.html">L</a>, C, D, and M</p>
<dl class="section author"><dt>Author</dt><dd><a href="https://github.com/Focusucof" target="_blank">Focusucof</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>
<td>(</td>
<td class="paramtype">void&#160;</td>
<td class="paramname"></td><td>)</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"> 118</span> {</div>
<div class="line"><span class="lineno"> 119</span> <a class="code hl_function" href="../../dd/de6/roman__numerals__to__decimal_8c.html#aa8dca7b867074164d5f45b0f3851269d">test</a>(); <span class="comment">// run self-test implementations</span></div>
<div class="line"><span class="lineno"> 120</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 121</span>}</div>
<div class="ttc" id="aroman__numerals__to__decimal_8c_html_aa8dca7b867074164d5f45b0f3851269d"><div class="ttname"><a href="../../dd/de6/roman__numerals__to__decimal_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> roman_numerals_to_decimal.c:73</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a1e86fb4466b6a175b910fa19c4a6ea03">&#9670;&#160;</a></span>roman_to_decimal()</h2>
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<td class="memname">int roman_to_decimal </td>
<td>(</td>
<td class="paramtype">char&#160;</td>
<td class="paramname"><em>input</em>[]</td><td>)</td>
<td></td>
</tr>
</table>
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<p>Converts roman numerals into a decimal number. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">input</td><td>Input roman numeral as a C-string </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The converted number in decimal form </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 51</span> {</div>
<div class="line"><span class="lineno"> 52</span> <span class="keywordtype">int</span> result = 0; <span class="comment">// result in decimal</span></div>
<div class="line"><span class="lineno"> 53</span> </div>
<div class="line"><span class="lineno"> 54</span> <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0; i &lt; strlen(input); i++) {</div>
<div class="line"><span class="lineno"> 55</span> <span class="keywordflow">if</span>(strlen(input) &gt; i + 1) {</div>
<div class="line"><span class="lineno"> 56</span> <span class="keywordflow">if</span>(<a class="code hl_function" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a95b7915cdb0df66a0aae7b769d3bbf88">symbol</a>(input[i]) &gt;= <a class="code hl_function" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a95b7915cdb0df66a0aae7b769d3bbf88">symbol</a>(input[i + 1])) {</div>
<div class="line"><span class="lineno"> 57</span> result += <a class="code hl_function" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a95b7915cdb0df66a0aae7b769d3bbf88">symbol</a>(input[i]); <span class="comment">// add value to sum</span></div>
<div class="line"><span class="lineno"> 58</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><span class="lineno"> 59</span> result += <a class="code hl_function" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a95b7915cdb0df66a0aae7b769d3bbf88">symbol</a>(input[i + 1]) - <a class="code hl_function" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a95b7915cdb0df66a0aae7b769d3bbf88">symbol</a>(input[i]); <span class="comment">// if the current symbol is smaller than the next (ex. IV), subtract it from the next symbol</span></div>
<div class="line"><span class="lineno"> 60</span> i++; <span class="comment">// skip over an extra symbol </span></div>
<div class="line"><span class="lineno"> 61</span> }</div>
<div class="line"><span class="lineno"> 62</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><span class="lineno"> 63</span> result += <a class="code hl_function" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a95b7915cdb0df66a0aae7b769d3bbf88">symbol</a>(input[i]); <span class="comment">// add value to sum</span></div>
<div class="line"><span class="lineno"> 64</span> }</div>
<div class="line"><span class="lineno"> 65</span> }</div>
<div class="line"><span class="lineno"> 66</span> <span class="keywordflow">return</span> result;</div>
<div class="line"><span class="lineno"> 67</span>}</div>
<div class="ttc" id="aroman__numerals__to__decimal_8c_html_a95b7915cdb0df66a0aae7b769d3bbf88"><div class="ttname"><a href="../../dd/de6/roman__numerals__to__decimal_8c.html#a95b7915cdb0df66a0aae7b769d3bbf88">symbol</a></div><div class="ttdeci">int symbol(char symbol)</div><div class="ttdoc">for assert</div><div class="ttdef"><b>Definition:</b> roman_numerals_to_decimal.c:18</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a95b7915cdb0df66a0aae7b769d3bbf88">&#9670;&#160;</a></span>symbol()</h2>
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<td class="memname">int symbol </td>
<td>(</td>
<td class="paramtype">char&#160;</td>
<td class="paramname"><em>symbol</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>for assert </p>
<p>for IO operations for strlen()</p>
<p>Convert roman numeral symbol to a decimal value helper function </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">symbol</td><td>Roman numeral char </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Integer of decimal value for given symbol </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 18</span> {</div>
<div class="line"><span class="lineno"> 19</span> <span class="keywordtype">int</span> value = 0;</div>
<div class="line"><span class="lineno"> 20</span> <span class="keywordflow">switch</span>(<a class="code hl_function" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a95b7915cdb0df66a0aae7b769d3bbf88">symbol</a>) {</div>
<div class="line"><span class="lineno"> 21</span> <span class="keywordflow">case</span> <span class="charliteral">&#39;I&#39;</span>:</div>
<div class="line"><span class="lineno"> 22</span> value = 1;</div>
<div class="line"><span class="lineno"> 23</span> <span class="keywordflow">break</span>;</div>
<div class="line"><span class="lineno"> 24</span> <span class="keywordflow">case</span> <span class="charliteral">&#39;V&#39;</span>:</div>
<div class="line"><span class="lineno"> 25</span> value = 5;</div>
<div class="line"><span class="lineno"> 26</span> <span class="keywordflow">break</span>;</div>
<div class="line"><span class="lineno"> 27</span> <span class="keywordflow">case</span> <span class="charliteral">&#39;X&#39;</span>:</div>
<div class="line"><span class="lineno"> 28</span> value = 10;</div>
<div class="line"><span class="lineno"> 29</span> <span class="keywordflow">break</span>;</div>
<div class="line"><span class="lineno"> 30</span> <span class="keywordflow">case</span> <span class="charliteral">&#39;L&#39;</span>:</div>
<div class="line"><span class="lineno"> 31</span> value = 50;</div>
<div class="line"><span class="lineno"> 32</span> <span class="keywordflow">break</span>;</div>
<div class="line"><span class="lineno"> 33</span> <span class="keywordflow">case</span> <span class="charliteral">&#39;C&#39;</span>:</div>
<div class="line"><span class="lineno"> 34</span> value = 100;</div>
<div class="line"><span class="lineno"> 35</span> <span class="keywordflow">break</span>;</div>
<div class="line"><span class="lineno"> 36</span> <span class="keywordflow">case</span> <span class="charliteral">&#39;D&#39;</span>:</div>
<div class="line"><span class="lineno"> 37</span> value = 500;</div>
<div class="line"><span class="lineno"> 38</span> <span class="keywordflow">break</span>;</div>
<div class="line"><span class="lineno"> 39</span> <span class="keywordflow">case</span> <span class="charliteral">&#39;M&#39;</span>:</div>
<div class="line"><span class="lineno"> 40</span> value = 1000;</div>
<div class="line"><span class="lineno"> 41</span> <span class="keywordflow">break</span>;</div>
<div class="line"><span class="lineno"> 42</span> }</div>
<div class="line"><span class="lineno"> 43</span> <span class="keywordflow">return</span> value; </div>
<div class="line"><span class="lineno"> 44</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>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">static</span></span> </td>
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</div><div class="memdoc">
<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"> 73</span> {</div>
<div class="line"><span class="lineno"> 74</span> <span class="comment">// 1st test</span></div>
<div class="line"><span class="lineno"> 75</span> <span class="keywordtype">char</span> input[] = <span class="stringliteral">&quot;MCMIV&quot;</span>;</div>
<div class="line"><span class="lineno"> 76</span> <span class="keywordtype">int</span> expected = 1904;</div>
<div class="line"><span class="lineno"> 77</span> </div>
<div class="line"><span class="lineno"> 78</span> <span class="keywordtype">int</span> output = <a class="code hl_function" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a1e86fb4466b6a175b910fa19c4a6ea03">roman_to_decimal</a>(input);</div>
<div class="line"><span class="lineno"> 79</span> </div>
<div class="line"><span class="lineno"> 80</span> printf(<span class="stringliteral">&quot;TEST 1\n&quot;</span>);</div>
<div class="line"><span class="lineno"> 81</span> printf(<span class="stringliteral">&quot;Input: %s\n&quot;</span>, input);</div>
<div class="line"><span class="lineno"> 82</span> printf(<span class="stringliteral">&quot;Expected Output: %d\n&quot;</span>, expected);</div>
<div class="line"><span class="lineno"> 83</span> printf(<span class="stringliteral">&quot;Output: %d\n&quot;</span>, output);</div>
<div class="line"><span class="lineno"> 84</span> assert(output == expected);</div>
<div class="line"><span class="lineno"> 85</span> printf(<span class="stringliteral">&quot;== TEST PASSED ==\n\n&quot;</span>);</div>
<div class="line"><span class="lineno"> 86</span> </div>
<div class="line"><span class="lineno"> 87</span> <span class="comment">// 2nd test</span></div>
<div class="line"><span class="lineno"> 88</span> <span class="keywordtype">char</span> input2[] = <span class="stringliteral">&quot;MMMDCCXXIV&quot;</span>;</div>
<div class="line"><span class="lineno"> 89</span> expected = 3724;</div>
<div class="line"><span class="lineno"> 90</span> </div>
<div class="line"><span class="lineno"> 91</span> output = <a class="code hl_function" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a1e86fb4466b6a175b910fa19c4a6ea03">roman_to_decimal</a>(input2);</div>
<div class="line"><span class="lineno"> 92</span> </div>
<div class="line"><span class="lineno"> 93</span> printf(<span class="stringliteral">&quot;TEST 2\n&quot;</span>);</div>
<div class="line"><span class="lineno"> 94</span> printf(<span class="stringliteral">&quot;Input: %s\n&quot;</span>, input2);</div>
<div class="line"><span class="lineno"> 95</span> printf(<span class="stringliteral">&quot;Expected Output: %d\n&quot;</span>, expected);</div>
<div class="line"><span class="lineno"> 96</span> printf(<span class="stringliteral">&quot;Output: %d\n&quot;</span>, output);</div>
<div class="line"><span class="lineno"> 97</span> assert(output == expected);</div>
<div class="line"><span class="lineno"> 98</span> printf(<span class="stringliteral">&quot;== TEST PASSED ==\n\n&quot;</span>);</div>
<div class="line"><span class="lineno"> 99</span> </div>
<div class="line"><span class="lineno"> 100</span> <span class="comment">// 3rd test</span></div>
<div class="line"><span class="lineno"> 101</span> <span class="keywordtype">char</span> input3[] = <span class="stringliteral">&quot;III&quot;</span>;</div>
<div class="line"><span class="lineno"> 102</span> expected = 3;</div>
<div class="line"><span class="lineno"> 103</span> </div>
<div class="line"><span class="lineno"> 104</span> output = <a class="code hl_function" href="../../dd/de6/roman__numerals__to__decimal_8c.html#a1e86fb4466b6a175b910fa19c4a6ea03">roman_to_decimal</a>(input3);</div>
<div class="line"><span class="lineno"> 105</span> </div>
<div class="line"><span class="lineno"> 106</span> printf(<span class="stringliteral">&quot;TEST 3\n&quot;</span>);</div>
<div class="line"><span class="lineno"> 107</span> printf(<span class="stringliteral">&quot;Input: %s\n&quot;</span>, input3);</div>
<div class="line"><span class="lineno"> 108</span> printf(<span class="stringliteral">&quot;Expected Output: %d\n&quot;</span>, expected);</div>
<div class="line"><span class="lineno"> 109</span> printf(<span class="stringliteral">&quot;Output: %d\n&quot;</span>, output);</div>
<div class="line"><span class="lineno"> 110</span> assert(output == expected);</div>
<div class="line"><span class="lineno"> 111</span> printf(<span class="stringliteral">&quot;== TEST PASSED ==\n\n&quot;</span>);</div>
<div class="line"><span class="lineno"> 112</span>}</div>
<div class="ttc" id="aroman__numerals__to__decimal_8c_html_a1e86fb4466b6a175b910fa19c4a6ea03"><div class="ttname"><a href="../../dd/de6/roman__numerals__to__decimal_8c.html#a1e86fb4466b6a175b910fa19c4a6ea03">roman_to_decimal</a></div><div class="ttdeci">int roman_to_decimal(char input[])</div><div class="ttdoc">Converts roman numerals into a decimal number.</div><div class="ttdef"><b>Definition:</b> roman_numerals_to_decimal.c:51</div></div>
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