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<div class="title">postfix_evaluation.cpp File Reference</div> </div>
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<p>Evaluation of <a href="https://en.wikipedia.org/wiki/Reverse_Polish_notation">Postfix Expression</a>
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;algorithm&gt;</code><br />
<code>#include &lt;array&gt;</code><br />
<code>#include &lt;cassert&gt;</code><br />
<code>#include &lt;iostream&gt;</code><br />
<code>#include &lt;string&gt;</code><br />
</div><div class="textblock"><div class="dynheader">
Include dependency graph for postfix_evaluation.cpp:</div>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">class &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d5/d8a/classothers_1_1postfix__expression_1_1_stack.html">others::postfix_expression::Stack</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Creates an array to be used as stack for storing values. <a href="../../d5/d8a/classothers_1_1postfix__expression_1_1_stack.html#details">More...</a><br /></td></tr>
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Namespaces</h2></td></tr>
<tr class="memitem:d0/d6f/namespaceothers"><td class="memItemLeft" align="right" valign="top"> &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d0/d6f/namespaceothers.html">others</a></td></tr>
<tr class="memdesc:d0/d6f/namespaceothers"><td class="mdescLeft">&#160;</td><td class="mdescRight">Other algorithms. <br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:d4/de6/namespacepostfix__expression"><td class="memItemLeft" align="right" valign="top"> &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/de6/namespacepostfix__expression.html">postfix_expression</a></td></tr>
<tr class="memdesc:d4/de6/namespacepostfix__expression"><td class="mdescLeft">&#160;</td><td class="mdescRight">Functions for Postfix Expression algorithm. <br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
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Functions</h2></td></tr>
<tr class="memitem:ad77f8c9cc594975756838d498c237cea"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d7/d75/postfix__evaluation_8cpp.html#ad77f8c9cc594975756838d498c237cea">others::postfix_expression::push</a> (float operand, Stack *<a class="el" href="../../d1/dc2/classstack.html">stack</a>)</td></tr>
<tr class="memdesc:ad77f8c9cc594975756838d498c237cea"><td class="mdescLeft">&#160;</td><td class="mdescRight">Pushing operand, also called the number in the array to the stack. <a href="../../d7/d75/postfix__evaluation_8cpp.html#ad77f8c9cc594975756838d498c237cea">More...</a><br /></td></tr>
<tr class="separator:ad77f8c9cc594975756838d498c237cea"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a421baa2002a64bc0bfc3e1b64800d734"><td class="memItemLeft" align="right" valign="top">float&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d7/d75/postfix__evaluation_8cpp.html#a421baa2002a64bc0bfc3e1b64800d734">others::postfix_expression::pop</a> (Stack *<a class="el" href="../../d1/dc2/classstack.html">stack</a>)</td></tr>
<tr class="memdesc:a421baa2002a64bc0bfc3e1b64800d734"><td class="mdescLeft">&#160;</td><td class="mdescRight">Popping operand, also called the number from the stack. <a href="../../d7/d75/postfix__evaluation_8cpp.html#a421baa2002a64bc0bfc3e1b64800d734">More...</a><br /></td></tr>
<tr class="separator:a421baa2002a64bc0bfc3e1b64800d734"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4c27f949c9d6659be9f5bd2ccbe1360a"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d7/d75/postfix__evaluation_8cpp.html#a4c27f949c9d6659be9f5bd2ccbe1360a">others::postfix_expression::is_number</a> (const <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> &amp;s)</td></tr>
<tr class="memdesc:a4c27f949c9d6659be9f5bd2ccbe1360a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Checks if scanned string is a number. <a href="../../d7/d75/postfix__evaluation_8cpp.html#a4c27f949c9d6659be9f5bd2ccbe1360a">More...</a><br /></td></tr>
<tr class="separator:a4c27f949c9d6659be9f5bd2ccbe1360a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a59fd597e0ea394abe027ced4d2ea3338"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d7/d75/postfix__evaluation_8cpp.html#a59fd597e0ea394abe027ced4d2ea3338">others::postfix_expression::evaluate</a> (float a, float b, const <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> &amp;operation, Stack *<a class="el" href="../../d1/dc2/classstack.html">stack</a>)</td></tr>
<tr class="memdesc:a59fd597e0ea394abe027ced4d2ea3338"><td class="mdescLeft">&#160;</td><td class="mdescRight">Evaluate answer using given last two operands from and operation. <a href="../../d7/d75/postfix__evaluation_8cpp.html#a59fd597e0ea394abe027ced4d2ea3338">More...</a><br /></td></tr>
<tr class="separator:a59fd597e0ea394abe027ced4d2ea3338"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae38bd3a177a6d61da3859a281233bbe1"><td class="memTemplParams" colspan="2">template&lt;std::size_t N&gt; </td></tr>
<tr class="memitem:ae38bd3a177a6d61da3859a281233bbe1"><td class="memTemplItemLeft" align="right" valign="top">float&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d7/d75/postfix__evaluation_8cpp.html#ae38bd3a177a6d61da3859a281233bbe1">others::postfix_expression::postfix_evaluation</a> (<a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array.html">std::array</a>&lt; <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a>, N &gt; input)</td></tr>
<tr class="memdesc:ae38bd3a177a6d61da3859a281233bbe1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Postfix Evaluation algorithm to compute the value from given input array. <a href="../../d7/d75/postfix__evaluation_8cpp.html#ae38bd3a177a6d61da3859a281233bbe1">More...</a><br /></td></tr>
<tr class="separator:ae38bd3a177a6d61da3859a281233bbe1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6a8eeb7d346d5cd6335d9780fb7c0f15"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d7/d75/postfix__evaluation_8cpp.html#a6a8eeb7d346d5cd6335d9780fb7c0f15">test_function_1</a> ()</td></tr>
<tr class="memdesc:a6a8eeb7d346d5cd6335d9780fb7c0f15"><td class="mdescLeft">&#160;</td><td class="mdescRight">Test function 1 with input array {'2', '3', '1', '*', '+', '9', '-'}. <a href="../../d7/d75/postfix__evaluation_8cpp.html#a6a8eeb7d346d5cd6335d9780fb7c0f15">More...</a><br /></td></tr>
<tr class="separator:a6a8eeb7d346d5cd6335d9780fb7c0f15"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5b97d12e8b61484f756a8721992bfae1"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d7/d75/postfix__evaluation_8cpp.html#a5b97d12e8b61484f756a8721992bfae1">test_function_2</a> ()</td></tr>
<tr class="memdesc:a5b97d12e8b61484f756a8721992bfae1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Test function 2 with input array {'1', '2', '+', '2', '/', '5', '*', '7', '+'}. <a href="../../d7/d75/postfix__evaluation_8cpp.html#a5b97d12e8b61484f756a8721992bfae1">More...</a><br /></td></tr>
<tr class="separator:a5b97d12e8b61484f756a8721992bfae1"><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="../../d7/d75/postfix__evaluation_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a> ()</td></tr>
<tr class="memdesc:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Main function. <a href="../../d7/d75/postfix__evaluation_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">More...</a><br /></td></tr>
<tr class="separator:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Evaluation of <a href="https://en.wikipedia.org/wiki/Reverse_Polish_notation">Postfix Expression</a> </p>
<dl class="section author"><dt>Author</dt><dd><a href="https://github.com/Darshana-Sarma">Darshana Sarma</a> Create a stack to store operands (or values). Scan the given expression and do following for every scanned element. If the element is a number, push it into the stack If the element is a operator, pop operands for the operator from stack. Evaluate the operator and push the result back to the stack When the expression is ended, the number in the stack is the final answer </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a59fd597e0ea394abe027ced4d2ea3338"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a59fd597e0ea394abe027ced4d2ea3338">&#9670;&nbsp;</a></span>evaluate()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void others::postfix_expression::evaluate </td>
<td>(</td>
<td class="paramtype">float&#160;</td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float&#160;</td>
<td class="paramname"><em>b</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> &amp;&#160;</td>
<td class="paramname"><em>operation</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="../../d5/d8a/classothers_1_1postfix__expression_1_1_stack.html">Stack</a> *&#160;</td>
<td class="paramname"><em>stack</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Evaluate answer using given last two operands from and operation. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">a</td><td>second last added operand which will be used for evaluation </td></tr>
<tr><td class="paramname">b</td><td>last added operand which will be used for evaluation </td></tr>
<tr><td class="paramname">operation</td><td>to be performed with respective floats </td></tr>
<tr><td class="paramname">stack</td><td>containing numbers </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>none </dd></dl>
<div class="fragment"><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordtype">float</span> c = 0;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keyword">const</span> <span class="keywordtype">char</span> *op = operation.<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/c_str.html">c_str</a>();</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keywordflow">switch</span> (*op) {</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordflow">case</span> <span class="charliteral">&#39;+&#39;</span>:</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; c = a + b; <span class="comment">// Addition of numbers</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <a class="code" href="../../dc/dc5/paranthesis__matching_8cpp.html#aae41c72130114bf31204cde6873b6095">others::postfix_expression::push</a>(c, <a class="code" href="../../d1/dc2/classstack.html">stack</a>);</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; </div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="keywordflow">case</span> <span class="charliteral">&#39;-&#39;</span>:</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; c = a - b; <span class="comment">// Subtraction of numbers</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <a class="code" href="../../dc/dc5/paranthesis__matching_8cpp.html#aae41c72130114bf31204cde6873b6095">others::postfix_expression::push</a>(c, <a class="code" href="../../d1/dc2/classstack.html">stack</a>);</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keywordflow">case</span> <span class="charliteral">&#39;*&#39;</span>:</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; c = a * b; <span class="comment">// Multiplication of numbers</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <a class="code" href="../../dc/dc5/paranthesis__matching_8cpp.html#aae41c72130114bf31204cde6873b6095">others::postfix_expression::push</a>(c, <a class="code" href="../../d1/dc2/classstack.html">stack</a>);</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; </div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keywordflow">case</span> <span class="charliteral">&#39;/&#39;</span>:</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; c = a / b; <span class="comment">// Division of numbers</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <a class="code" href="../../dc/dc5/paranthesis__matching_8cpp.html#aae41c72130114bf31204cde6873b6095">others::postfix_expression::push</a>(c, <a class="code" href="../../d1/dc2/classstack.html">stack</a>);</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; </div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Operator not defined\n&quot;</span>;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; }</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;}</div>
</div><!-- fragment --><div class="dynheader">
Here is the call graph for this function:</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a4c27f949c9d6659be9f5bd2ccbe1360a">&#9670;&nbsp;</a></span>is_number()</h2>
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<td class="memname">bool others::postfix_expression::is_number </td>
<td>(</td>
<td class="paramtype">const <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> &amp;&#160;</td>
<td class="paramname"><em>s</em></td><td>)</td>
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<p>Checks if scanned string is a number. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">s</td><td>scanned string </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>bool boolean value if string is number </dd></dl>
<div class="fragment"><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; {</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keywordflow">return</span> !s.<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">empty</a>() &amp;&amp; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/all_any_none_of.html">std::all_of</a>(s.<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/begin.html">begin</a>(), s.<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/end.html">end</a>(), ::isdigit);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#ae66f6b31b5ad750f1fe042a706a4e3d4">&#9670;&nbsp;</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"><a name="l00171"></a><span class="lineno"> 171</span>&#160; {</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; <a class="code" href="../../d7/d75/postfix__evaluation_8cpp.html#a6a8eeb7d346d5cd6335d9780fb7c0f15">test_function_1</a>();</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; <a class="code" href="../../d7/d75/postfix__evaluation_8cpp.html#a5b97d12e8b61484f756a8721992bfae1">test_function_2</a>();</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; </div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;\nTest implementations passed!\n&quot;</span>;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; </div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a421baa2002a64bc0bfc3e1b64800d734">&#9670;&nbsp;</a></span>pop()</h2>
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<td class="memname">float others::postfix_expression::pop </td>
<td>(</td>
<td class="paramtype"><a class="el" href="../../d5/d8a/classothers_1_1postfix__expression_1_1_stack.html">Stack</a> *&#160;</td>
<td class="paramname"><em>stack</em></td><td>)</td>
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<p>Popping operand, also called the number from the stack. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">stack</td><td>stack containing numbers </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>operand float on top of stack </dd></dl>
<div class="fragment"><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; {</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="keywordtype">float</span> operand = <a class="code" href="../../d1/dc2/classstack.html">stack</a>-&gt;<a class="code" href="../../d1/dc2/classstack.html#a5b64337ec34b12e98458bb9b9d5f8f83">stack</a>[<a class="code" href="../../d1/dc2/classstack.html">stack</a>-&gt;<a class="code" href="../../d1/dc2/classstack.html#a7289037c059aaad492b4d68e6bd54453">stackTop</a>];</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <a class="code" href="../../d1/dc2/classstack.html">stack</a>-&gt;<a class="code" href="../../d1/dc2/classstack.html#a7289037c059aaad492b4d68e6bd54453">stackTop</a>--;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keywordflow">return</span> operand;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#ae38bd3a177a6d61da3859a281233bbe1">&#9670;&nbsp;</a></span>postfix_evaluation()</h2>
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template&lt;std::size_t N&gt; </div>
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<td class="memname">float others::postfix_expression::postfix_evaluation </td>
<td>(</td>
<td class="paramtype"><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array.html">std::array</a>&lt; <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a>, N &gt;&#160;</td>
<td class="paramname"><em>input</em></td><td>)</td>
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<p>Postfix Evaluation algorithm to compute the value from given input array. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">N</td><td>number of array size </td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">input</td><td>Array of characters consisting of numbers and operations </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>stack[stackTop] returns the top value from the stack </dd></dl>
<div class="fragment"><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; {</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; Stack <a class="code" href="../../dc/dc5/paranthesis__matching_8cpp.html#aa37d24a036d239b3b528f13b9de880c7">stack</a>;</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <span class="keywordtype">int</span> j = 0;</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; </div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; <span class="keywordflow">while</span> (j &lt; N) {</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> scan = input[j];</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keywordflow">if</span> (<a class="code" href="../../d7/d75/postfix__evaluation_8cpp.html#a4c27f949c9d6659be9f5bd2ccbe1360a">is_number</a>(scan)) {</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; <a class="code" href="../../dc/dc5/paranthesis__matching_8cpp.html#aae41c72130114bf31204cde6873b6095">push</a>(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/stof.html">std::stof</a>(scan), &amp;<a class="code" href="../../d1/dc2/classstack.html">stack</a>);</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; </div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; <span class="keywordtype">float</span> op2 = <a class="code" href="../../dc/dc5/paranthesis__matching_8cpp.html#a6d25c7dfbfeb52c3cb9d1b56ab49b664">pop</a>(&amp;<a class="code" href="../../d1/dc2/classstack.html">stack</a>);</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; <span class="keywordtype">float</span> op1 = <a class="code" href="../../dc/dc5/paranthesis__matching_8cpp.html#a6d25c7dfbfeb52c3cb9d1b56ab49b664">pop</a>(&amp;<a class="code" href="../../d1/dc2/classstack.html">stack</a>);</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; <a class="code" href="../../d7/d75/postfix__evaluation_8cpp.html#a59fd597e0ea394abe027ced4d2ea3338">evaluate</a>(op1, op2, scan, &amp;<a class="code" href="../../d1/dc2/classstack.html">stack</a>);</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; }</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; j++;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; }</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; </div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <a class="code" href="../../d1/dc2/classstack.html">stack</a>.<a class="code" href="../../d1/dc2/classstack.html#a5b64337ec34b12e98458bb9b9d5f8f83">stack</a>[<a class="code" href="../../d1/dc2/classstack.html">stack</a>.<a class="code" href="../../d1/dc2/classstack.html#a7289037c059aaad492b4d68e6bd54453">stackTop</a>] &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; </div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; <span class="keywordflow">return</span> <a class="code" href="../../d1/dc2/classstack.html">stack</a>.<a class="code" href="../../d1/dc2/classstack.html#a5b64337ec34b12e98458bb9b9d5f8f83">stack</a>[<a class="code" href="../../d1/dc2/classstack.html">stack</a>.<a class="code" href="../../d1/dc2/classstack.html#a7289037c059aaad492b4d68e6bd54453">stackTop</a>];</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#ad77f8c9cc594975756838d498c237cea">&#9670;&nbsp;</a></span>push()</h2>
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<td class="memname">void others::postfix_expression::push </td>
<td>(</td>
<td class="paramtype">float&#160;</td>
<td class="paramname"><em>operand</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="../../d5/d8a/classothers_1_1postfix__expression_1_1_stack.html">Stack</a> *&#160;</td>
<td class="paramname"><em>stack</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
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<p>Pushing operand, also called the number in the array to the stack. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">operand</td><td>float value from the input array or evaluation </td></tr>
<tr><td class="paramname">stack</td><td>stack containing numbers </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>none </dd></dl>
<div class="fragment"><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; {</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <a class="code" href="../../d1/dc2/classstack.html">stack</a>-&gt;<a class="code" href="../../d1/dc2/classstack.html#a7289037c059aaad492b4d68e6bd54453">stackTop</a>++;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <a class="code" href="../../d1/dc2/classstack.html">stack</a>-&gt;<a class="code" href="../../d1/dc2/classstack.html#a5b64337ec34b12e98458bb9b9d5f8f83">stack</a>[<a class="code" href="../../d1/dc2/classstack.html">stack</a>-&gt;<a class="code" href="../../d1/dc2/classstack.html#a7289037c059aaad492b4d68e6bd54453">stackTop</a>] = operand;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a6a8eeb7d346d5cd6335d9780fb7c0f15">&#9670;&nbsp;</a></span>test_function_1()</h2>
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<td class="memname">static void test_function_1 </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>Test function 1 with input array {'2', '3', '1', '*', '+', '9', '-'}. </p>
<dl class="section return"><dt>Returns</dt><dd>none </dd></dl>
<div class="fragment"><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; {</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array.html">std::array&lt;std::string, 7&gt;</a> input = {<span class="stringliteral">&quot;2&quot;</span>, <span class="stringliteral">&quot;3&quot;</span>, <span class="stringliteral">&quot;1&quot;</span>, <span class="stringliteral">&quot;*&quot;</span>, <span class="stringliteral">&quot;+&quot;</span>, <span class="stringliteral">&quot;9&quot;</span>, <span class="stringliteral">&quot;-&quot;</span>};</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; </div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <span class="keywordtype">float</span> answer = <a class="code" href="../../d7/d75/postfix__evaluation_8cpp.html#ae38bd3a177a6d61da3859a281233bbe1">others::postfix_expression::postfix_evaluation</a>(input);</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; </div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; assert(answer == -4);</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a5b97d12e8b61484f756a8721992bfae1">&#9670;&nbsp;</a></span>test_function_2()</h2>
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<td class="memname">static void test_function_2 </td>
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<td class="paramname"></td><td>)</td>
<td></td>
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<p>Test function 2 with input array {'1', '2', '+', '2', '/', '5', '*', '7', '+'}. </p>
<dl class="section return"><dt>Returns</dt><dd>none </dd></dl>
<div class="fragment"><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; {</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array.html">std::array&lt;std::string, 9&gt;</a> input = {<span class="stringliteral">&quot;100&quot;</span>, <span class="stringliteral">&quot;200&quot;</span>, <span class="stringliteral">&quot;+&quot;</span>, <span class="stringliteral">&quot;2&quot;</span>, <span class="stringliteral">&quot;/&quot;</span>,</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; <span class="stringliteral">&quot;5&quot;</span>, <span class="stringliteral">&quot;*&quot;</span>, <span class="stringliteral">&quot;7&quot;</span>, <span class="stringliteral">&quot;+&quot;</span>};</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; <span class="keywordtype">float</span> answer = <a class="code" href="../../d7/d75/postfix__evaluation_8cpp.html#ae38bd3a177a6d61da3859a281233bbe1">others::postfix_expression::postfix_evaluation</a>(input);</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160; </div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; assert(answer == 757);</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160;}</div>
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<div class="ttc" id="abasic_string_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div><div class="ttdoc">STL class.</div></div>
<div class="ttc" id="aall_any_none_of_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/all_any_none_of.html">std::all_of</a></div><div class="ttdeci">T all_of(T... args)</div></div>
<div class="ttc" id="apostfix__evaluation_8cpp_html_a4c27f949c9d6659be9f5bd2ccbe1360a"><div class="ttname"><a href="../../d7/d75/postfix__evaluation_8cpp.html#a4c27f949c9d6659be9f5bd2ccbe1360a">others::postfix_expression::is_number</a></div><div class="ttdeci">bool is_number(const std::string &amp;s)</div><div class="ttdoc">Checks if scanned string is a number.</div><div class="ttdef"><b>Definition:</b> postfix_evaluation.cpp:65</div></div>
<div class="ttc" id="apostfix__evaluation_8cpp_html_a5b97d12e8b61484f756a8721992bfae1"><div class="ttname"><a href="../../d7/d75/postfix__evaluation_8cpp.html#a5b97d12e8b61484f756a8721992bfae1">test_function_2</a></div><div class="ttdeci">static void test_function_2()</div><div class="ttdoc">Test function 2 with input array {'1', '2', '+', '2', '/', '5', '*', '7', '+'}.</div><div class="ttdef"><b>Definition:</b> postfix_evaluation.cpp:159</div></div>
<div class="ttc" id="abasic_ostream_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a></div></div>
<div class="ttc" id="ac_str_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/c_str.html">std::string::c_str</a></div><div class="ttdeci">T c_str(T... args)</div></div>
<div class="ttc" id="apostfix__evaluation_8cpp_html_ae38bd3a177a6d61da3859a281233bbe1"><div class="ttname"><a href="../../d7/d75/postfix__evaluation_8cpp.html#ae38bd3a177a6d61da3859a281233bbe1">others::postfix_expression::postfix_evaluation</a></div><div class="ttdeci">float postfix_evaluation(std::array&lt; std::string, N &gt; input)</div><div class="ttdoc">Postfix Evaluation algorithm to compute the value from given input array.</div><div class="ttdef"><b>Definition:</b> postfix_evaluation.cpp:115</div></div>
<div class="ttc" id="aarray_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/array.html">std::array</a></div><div class="ttdoc">STL class.</div></div>
<div class="ttc" id="apostfix__evaluation_8cpp_html_a6a8eeb7d346d5cd6335d9780fb7c0f15"><div class="ttname"><a href="../../d7/d75/postfix__evaluation_8cpp.html#a6a8eeb7d346d5cd6335d9780fb7c0f15">test_function_1</a></div><div class="ttdeci">static void test_function_1()</div><div class="ttdoc">Test function 1 with input array {'2', '3', '1', '*', '+', '9', '-'}.</div><div class="ttdef"><b>Definition:</b> postfix_evaluation.cpp:146</div></div>
<div class="ttc" id="apostfix__evaluation_8cpp_html_a59fd597e0ea394abe027ced4d2ea3338"><div class="ttname"><a href="../../d7/d75/postfix__evaluation_8cpp.html#a59fd597e0ea394abe027ced4d2ea3338">others::postfix_expression::evaluate</a></div><div class="ttdeci">void evaluate(float a, float b, const std::string &amp;operation, Stack *stack)</div><div class="ttdoc">Evaluate answer using given last two operands from and operation.</div><div class="ttdef"><b>Definition:</b> postfix_evaluation.cpp:77</div></div>
<div class="ttc" id="astof_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/stof.html">std::stof</a></div><div class="ttdeci">T stof(T... args)</div></div>
<div class="ttc" id="aclassstack_html_a5b64337ec34b12e98458bb9b9d5f8f83"><div class="ttname"><a href="../../d1/dc2/classstack.html#a5b64337ec34b12e98458bb9b9d5f8f83">stack::stack</a></div><div class="ttdeci">stack()</div><div class="ttdef"><b>Definition:</b> stack.h:41</div></div>
<div class="ttc" id="abegin_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/begin.html">std::string::begin</a></div><div class="ttdeci">T begin(T... args)</div></div>
<div class="ttc" id="aclassstack_html"><div class="ttname"><a href="../../d1/dc2/classstack.html">stack</a></div><div class="ttdef"><b>Definition:</b> stack.h:26</div></div>
<div class="ttc" id="aempty_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">std::string::empty</a></div><div class="ttdeci">T empty(T... args)</div></div>
<div class="ttc" id="aclassstack_html_a7289037c059aaad492b4d68e6bd54453"><div class="ttname"><a href="../../d1/dc2/classstack.html#a7289037c059aaad492b4d68e6bd54453">stack::stackTop</a></div><div class="ttdeci">node&lt; Type &gt; * stackTop</div><div class="ttdef"><b>Definition:</b> stack.h:146</div></div>
<div class="ttc" id="aend_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/end.html">std::string::end</a></div><div class="ttdeci">T end(T... args)</div></div>
<div class="ttc" id="aparanthesis__matching_8cpp_html_aa37d24a036d239b3b528f13b9de880c7"><div class="ttname"><a href="../../dc/dc5/paranthesis__matching_8cpp.html#aa37d24a036d239b3b528f13b9de880c7">stack</a></div><div class="ttdeci">char stack[MAX]</div><div class="ttdef"><b>Definition:</b> paranthesis_matching.cpp:20</div></div>
<div class="ttc" id="aparanthesis__matching_8cpp_html_aae41c72130114bf31204cde6873b6095"><div class="ttname"><a href="../../dc/dc5/paranthesis__matching_8cpp.html#aae41c72130114bf31204cde6873b6095">push</a></div><div class="ttdeci">void push(char ch)</div><div class="ttdoc">push byte to stack variable</div><div class="ttdef"><b>Definition:</b> paranthesis_matching.cpp:26</div></div>
<div class="ttc" id="aparanthesis__matching_8cpp_html_a6d25c7dfbfeb52c3cb9d1b56ab49b664"><div class="ttname"><a href="../../dc/dc5/paranthesis__matching_8cpp.html#a6d25c7dfbfeb52c3cb9d1b56ab49b664">pop</a></div><div class="ttdeci">char pop()</div><div class="ttdoc">pop a byte out of stack variable</div><div class="ttdef"><b>Definition:</b> paranthesis_matching.cpp:29</div></div>
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