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<title>Algorithms_in_C++: bit_manipulation/count_bits_flip.cpp File Reference</title>
<title>TheAlgorithms/C++: bit_manipulation/count_bits_flip.cpp File Reference</title>
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<div id="projectname">Algorithms_in_C++<span id="projectnumber">&#160;1.0.0</span>
<div id="projectname">TheAlgorithms/C++<span id="projectnumber">&#160;1.0.0</span>
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<div id="projectbrief">Set of algorithms implemented in C++.</div>
<div id="projectbrief">All the algorithms implemented in C++</div>
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@@ -121,7 +138,9 @@ Include dependency graph for count_bits_flip.cpp:</div>
<div class="dyncontent">
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<p><a href="../../d7/d56/count__bits__flip_8cpp_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="namespaces" name="namespaces"></a>
Namespaces</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">namespace &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d7/d81/namespacebit__manipulation.html">bit_manipulation</a></td></tr>
@@ -133,7 +152,7 @@ Namespaces</h2></td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:a2548486b6c3b80101e768562e687ef7b" id="r_a2548486b6c3b80101e768562e687ef7b"><td class="memItemLeft" align="right" valign="top"><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint64_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a2548486b6c3b80101e768562e687ef7b">bit_manipulation::count_bits_flip::countBitsFlip</a> (<a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a> A, <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a> B)</td></tr>
<tr class="memitem:a2548486b6c3b80101e768562e687ef7b" id="r_a2548486b6c3b80101e768562e687ef7b"><td class="memItemLeft" align="right" valign="top">std::uint64_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a2548486b6c3b80101e768562e687ef7b">bit_manipulation::count_bits_flip::countBitsFlip</a> (std::int64_t A, std::int64_t B)</td></tr>
<tr class="memdesc:a2548486b6c3b80101e768562e687ef7b"><td class="mdescLeft">&#160;</td><td class="mdescRight">The main function implements count of bits flip required. <br /></td></tr>
<tr class="separator:a2548486b6c3b80101e768562e687ef7b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa8dca7b867074164d5f45b0f3851269d" id="r_aa8dca7b867074164d5f45b0f3851269d"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#aa8dca7b867074164d5f45b0f3851269d">test</a> ()</td></tr>
@@ -149,6 +168,8 @@ Functions</h2></td></tr>
<p>Explanation:</p>
<p>A = 01010 B = 10100 As we can see, the bits of A that need to be flipped are 01010. If we flipthese bits, we get 10100, which is B.</p>
<p>Worst Case Time Complexity: O(log n) Space complexity: O(1) </p><dl class="section author"><dt>Author</dt><dd><a href="https://github.com/yashrajyash" target="_blank">Yash Raj Singh</a> </dd></dl>
<p class="definition">Definition in file <a class="el" href="../../d7/d56/count__bits__flip_8cpp_source.html">count_bits_flip.cpp</a>.</p>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a2548486b6c3b80101e768562e687ef7b" name="a2548486b6c3b80101e768562e687ef7b"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a2548486b6c3b80101e768562e687ef7b">&#9670;&#160;</a></span>countBitsFlip()</h2>
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<div class="memproto">
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<td class="memname"><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint64_t</a> bit_manipulation::count_bits_flip::countBitsFlip </td>
<td class="memname">std::uint64_t bit_manipulation::count_bits_flip::countBitsFlip </td>
<td>(</td>
<td class="paramtype"><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a></td> <td class="paramname"><span class="paramname"><em>A</em></span>, </td>
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<td class="paramtype"><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a></td> <td class="paramname"><span class="paramname"><em>B</em></span>&#160;)</td>
<td class="paramtype">std::int64_t</td> <td class="paramname"><span class="paramname"><em>B</em></span>&#160;)</td>
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@@ -178,6 +199,8 @@ Functions</h2></td></tr>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>total number of bits needed to be flipped to convert A to B </dd></dl>
<p class="definition">Definition at line <a class="el" href="../../d7/d56/count__bits__flip_8cpp_source.html#l00043">43</a> of file <a class="el" href="../../d7/d56/count__bits__flip_8cpp_source.html">count_bits_flip.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 45</span> { <span class="comment">// int64_t is preferred over int so that</span></div>
<div class="line"><span class="lineno"> 46</span> <span class="comment">// no Overflow can be there.</span></div>
<div class="line"><span class="lineno"> 47</span> </div>
@@ -191,12 +214,7 @@ Functions</h2></td></tr>
<div class="line"><span class="lineno"> 55</span> }</div>
<div class="line"><span class="lineno"> 56</span> <span class="keywordflow">return</span> count;</div>
<div class="line"><span class="lineno"> 57</span>}</div>
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<p>Main function. </p>
<dl class="section return"><dt>Returns</dt><dd>0 on exit </dd></dl>
<p class="definition">Definition at line <a class="el" href="../../d7/d56/count__bits__flip_8cpp_source.html#l00086">86</a> of file <a class="el" href="../../d7/d56/count__bits__flip_8cpp_source.html">count_bits_flip.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 86</span> {</div>
<div class="line"><span class="lineno"> 87</span> <a class="code hl_function" href="#aa8dca7b867074164d5f45b0f3851269d">test</a>(); <span class="comment">// run self-test implementations</span></div>
<div class="line"><span class="lineno"> 88</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 89</span>}</div>
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<p>Self-test implementations. </p>
<dl class="section return"><dt>Returns</dt><dd>void </dd></dl>
<p class="definition">Definition at line <a class="el" href="../../d7/d56/count__bits__flip_8cpp_source.html#l00065">65</a> of file <a class="el" href="../../d7/d56/count__bits__flip_8cpp_source.html">count_bits_flip.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 65</span> {</div>
<div class="line"><span class="lineno"> 66</span> <span class="comment">// A = 10, B = 20 return 4</span></div>
<div class="line"><span class="lineno"> 67</span> assert(bit_manipulation::count_bits_flip::countBitsFlip(10, 20) == 4);</div>
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<div class="line"><span class="lineno"> 77</span> assert(bit_manipulation::count_bits_flip::countBitsFlip(21, 22) == 2);</div>
<div class="line"><span class="lineno"> 78</span> <span class="comment">// A = 7, B = 786 return 5</span></div>
<div class="line"><span class="lineno"> 79</span> assert(bit_manipulation::count_bits_flip::countBitsFlip(7, 786) == 5);</div>
<div class="line"><span class="lineno"> 80</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;All test cases successfully passed!&quot;</span> &lt;&lt; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><span class="lineno"> 80</span> std::cout &lt;&lt; <span class="stringliteral">&quot;All test cases successfully passed!&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><span class="lineno"> 81</span>}</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="aendl_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a></div><div class="ttdeci">T endl(T... args)</div></div>
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