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<div class="headertitle"><div class="title">set_kth_bit.cpp</div></div>
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<a href="../../d5/db5/set__kth__bit_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#include &lt;cassert&gt;</span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="preprocessor">#include &lt;cstdint&gt;</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="preprocessor">#include &lt;iostream&gt;</span> </div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../d7/d81/namespacebit__manipulation.html">bit_manipulation</a> {</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="keyword">namespace </span>set_kth_bit {</div>
<div class="foldopen" id="foldopen00043" data-start="{" data-end="}">
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"><a class="line" href="../../d5/db5/set__kth__bit_8cpp.html#ad4d0ffd9331242c42a28834ee19f5fd9"> 43</a></span>std::uint64_t <a class="code hl_namespace" href="../../d8/d88/namespaceset_kth_bit.html">setKthBit</a>(std ::int64_t N,</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> std ::int64_t k) { <span class="comment">// int64_t is preferred over int so</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// that no Overflow can be there.</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keywordtype">int</span> pos =</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> 1 &lt;&lt; k; <span class="comment">// &quot;pos&quot; variable is used to store 1 at kth postion and</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="comment">// rest bits are 0. in binary representation of number &#39;n&#39;</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keywordflow">return</span> N | pos; <span class="comment">// by taking or with the pos and the N we set the bit of N</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="comment">// at kth position.</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span>}</div>
</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span>} <span class="comment">// namespace set_kth_bit</span></div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span>} <span class="comment">// namespace bit_manipulation</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span></div>
<div class="foldopen" id="foldopen00061" data-start="{" data-end="}">
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"><a class="line" href="../../d5/db5/set__kth__bit_8cpp.html#aa8dca7b867074164d5f45b0f3851269d"> 61</a></span><span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../d5/db5/set__kth__bit_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a>() {</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="comment">// n = 10,2 return 14</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> assert(<a class="code hl_function" href="../../d5/db5/set__kth__bit_8cpp.html#ad4d0ffd9331242c42a28834ee19f5fd9">bit_manipulation::set_kth_bit::setKthBit</a>(10, 2) == 14);</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="comment">// n = 25,1 return 27</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> assert(<a class="code hl_function" href="../../d5/db5/set__kth__bit_8cpp.html#ad4d0ffd9331242c42a28834ee19f5fd9">bit_manipulation::set_kth_bit::setKthBit</a>(25, 1) == 27);</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="comment">// n = 400001,5 return 400033</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> assert(<a class="code hl_function" href="../../d5/db5/set__kth__bit_8cpp.html#ad4d0ffd9331242c42a28834ee19f5fd9">bit_manipulation::set_kth_bit::setKthBit</a>(400001, 5) == 400033);</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="comment">// n = 123 return 123</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> assert(<a class="code hl_function" href="../../d5/db5/set__kth__bit_8cpp.html#ad4d0ffd9331242c42a28834ee19f5fd9">bit_manipulation::set_kth_bit::setKthBit</a>(123, 3) == 123);</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> </div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> std::cout &lt;&lt; <span class="stringliteral">&quot;All test cases successfully passed!&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span>}</div>
</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span></div>
<div class="foldopen" id="foldopen00077" data-start="{" data-end="}">
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"><a class="line" href="../../d5/db5/set__kth__bit_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4"> 77</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="../../d5/db5/set__kth__bit_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <a class="code hl_function" href="../../d5/db5/set__kth__bit_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a>(); <span class="comment">// run self-test implementations</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span>}</div>
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<div class="ttc" id="anamespacebit__manipulation_html"><div class="ttname"><a href="../../d7/d81/namespacebit__manipulation.html">bit_manipulation</a></div><div class="ttdoc">for assert</div></div>
<div class="ttc" id="anamespaceset_kth_bit_html"><div class="ttname"><a href="../../d8/d88/namespaceset_kth_bit.html">setKthBit</a></div><div class="ttdoc">Functions for the [From the right, set the Kth bit in the binary representation of N] (https://practi...</div></div>
<div class="ttc" id="aset__kth__bit_8cpp_html_aa8dca7b867074164d5f45b0f3851269d"><div class="ttname"><a href="../../d5/db5/set__kth__bit_8cpp.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> <a href="#l00061">set_kth_bit.cpp:61</a></div></div>
<div class="ttc" id="aset__kth__bit_8cpp_html_ad4d0ffd9331242c42a28834ee19f5fd9"><div class="ttname"><a href="../../d5/db5/set__kth__bit_8cpp.html#ad4d0ffd9331242c42a28834ee19f5fd9">bit_manipulation::set_kth_bit::setKthBit</a></div><div class="ttdeci">std::uint64_t setKthBit(std ::int64_t N, std ::int64_t k)</div><div class="ttdoc">The main function implements set kth bit.</div><div class="ttdef"><b>Definition</b> <a href="#l00043">set_kth_bit.cpp:43</a></div></div>
<div class="ttc" id="aset__kth__bit_8cpp_html_ae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="../../d5/db5/set__kth__bit_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdoc">Main function.</div><div class="ttdef"><b>Definition</b> <a href="#l00077">set_kth_bit.cpp:77</a></div></div>
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