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<div class="headertitle"><div class="title">string_fibonacci.cpp</div></div>
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<div class="contents">
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<a href="../../de/d47/string__fibonacci_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>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span> </div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include <cstdint></span></div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include <iostream></span></div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#ifdef _MSC_VER</span></div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include <string></span> <span class="comment">// use this for MS Visual C</span></div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor">#else</span></div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#include <cstring></span> <span class="comment">// otherwise</span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#endif</span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span></div>
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<div class="foldopen" id="foldopen00025" data-start="{" data-end="}">
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"><a class="line" href="../../de/d47/string__fibonacci_8cpp.html#a28052eee05d43c2ebc5147c52bd50c35"> 25</a></span>std::string <a class="code hl_function" href="../../de/d47/string__fibonacci_8cpp.html#a28052eee05d43c2ebc5147c52bd50c35">add</a>(std::string a, std::string b) {</div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> std::string temp = <span class="stringliteral">""</span>;</div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="comment">// carry flag</span></div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> <span class="keywordtype">int</span> carry = 0;</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> </div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> <span class="comment">// fills up with zeros</span></div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> <span class="keywordflow">while</span> (a.length() < b.length()) {</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> a = <span class="stringliteral">"0"</span> + a;</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> }</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> </div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> <span class="comment">// fills up with zeros</span></div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keywordflow">while</span> (b.length() < a.length()) {</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> b = <span class="stringliteral">"0"</span> + b;</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> }</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> </div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// adds the numbers a and b</span></div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = a.length() - 1; i >= 0; i--) {</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keywordtype">char</span> val = <span class="keyword">static_cast<</span><span class="keywordtype">char</span><span class="keyword">></span>(((a[i] - 48) + (b[i] - 48)) + 48 + carry);</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keywordflow">if</span> (val > 57) {</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> carry = 1;</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> val -= 10;</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> carry = 0;</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> }</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> temp = val + temp;</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> }</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// processes the carry flag</span></div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keywordflow">if</span> (carry == 1) {</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> temp = <span class="stringliteral">"1"</span> + temp;</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> }</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> </div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> <span class="comment">// removes leading zeros.</span></div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keywordflow">while</span> (temp[0] == <span class="charliteral">'0'</span> && temp.length() > 1) {</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> temp = temp.substr(1);</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> }</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> </div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <span class="keywordflow">return</span> temp;</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span>}</div>
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</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span></div>
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<div class="foldopen" id="foldopen00069" data-start="{" data-end="}">
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"><a class="line" href="../../de/d47/string__fibonacci_8cpp.html#ad8055ee368a5d5b24de01bdde6bf8fca"> 69</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="../../de/d47/string__fibonacci_8cpp.html#ad8055ee368a5d5b24de01bdde6bf8fca">fib_Accurate</a>(uint64_t n) {</div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> std::string tmp = <span class="stringliteral">""</span>;</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> std::string fibMinus1 = <span class="stringliteral">"1"</span>;</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> std::string fibMinus2 = <span class="stringliteral">"0"</span>;</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordflow">for</span> (uint64_t i = 0; i < n; i++) {</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> tmp = <a class="code hl_function" href="../../de/d47/string__fibonacci_8cpp.html#a28052eee05d43c2ebc5147c52bd50c35">add</a>(fibMinus1, fibMinus2);</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> fibMinus2 = fibMinus1;</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> fibMinus1 = tmp;</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> }</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> std::cout << fibMinus2;</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span>}</div>
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</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span></div>
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<div class="foldopen" id="foldopen00082" data-start="{" data-end="}">
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"><a class="line" href="../../de/d47/string__fibonacci_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4"> 82</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="../../de/d47/string__fibonacci_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keywordtype">int</span> n;</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> std::cout << <span class="stringliteral">"Enter whatever number N you want to find the fibonacci of\n"</span>;</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> std::cin >> n;</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> std::cout << n << <span class="stringliteral">" th Fibonacci is \n"</span>;</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <a class="code hl_function" href="../../de/d47/string__fibonacci_8cpp.html#ad8055ee368a5d5b24de01bdde6bf8fca">fib_Accurate</a>(n);</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> </div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <span class="keywordflow">return</span> 0;</div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span>}</div>
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</div>
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<div class="ttc" id="astring__fibonacci_8cpp_html_a28052eee05d43c2ebc5147c52bd50c35"><div class="ttname"><a href="../../de/d47/string__fibonacci_8cpp.html#a28052eee05d43c2ebc5147c52bd50c35">add</a></div><div class="ttdeci">std::string add(std::string a, std::string b)</div><div class="ttdef"><b>Definition</b> <a href="#l00025">string_fibonacci.cpp:25</a></div></div>
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<div class="ttc" id="astring__fibonacci_8cpp_html_ad8055ee368a5d5b24de01bdde6bf8fca"><div class="ttname"><a href="../../de/d47/string__fibonacci_8cpp.html#ad8055ee368a5d5b24de01bdde6bf8fca">fib_Accurate</a></div><div class="ttdeci">void fib_Accurate(uint64_t n)</div><div class="ttdef"><b>Definition</b> <a href="#l00069">string_fibonacci.cpp:69</a></div></div>
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<div class="ttc" id="astring__fibonacci_8cpp_html_ae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="../../de/d47/string__fibonacci_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdef"><b>Definition</b> <a href="#l00082">string_fibonacci.cpp:82</a></div></div>
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