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realstealthninja
@@ -4,7 +4,7 @@
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<title>TheAlgorithms/C++: ciphers/caesar_cipher.cpp Source File</title>
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@@ -60,7 +60,7 @@ window.MathJax = {
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@@ -124,19 +124,19 @@ $(function(){initNavTree('d6/d2c/caesar__cipher_8cpp_source.html','../../'); ini
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<div class="headertitle"><div class="title">caesar_cipher.cpp</div></div>
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</div><!--header-->
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<div class="contents">
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<a href="../../d6/d2c/caesar__cipher_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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<a href="../../d6/d2c/caesar__cipher_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="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="preprocessor">#include <iostream></span></div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="preprocessor">#include <string></span></div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="preprocessor">#include <cassert></span></div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> </div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span></div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../d6/d4e/namespaceciphers.html">ciphers</a> {</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">namespace </span><a class="code hl_namespace" href="../../dd/d81/namespacecaesar.html">caesar</a> { </div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">namespace </span>{</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">inline</span> <span class="keywordtype">char</span> <a class="code hl_function" href="../../d4/d08/sha256_8cpp.html#a9e98c180d32b04aab6f767cb0c13e1da">get_char</a>(<span class="keyword">const</span> <span class="keywordtype">int</span> x) {</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">namespace </span>{ </div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">inline</span> <span class="keywordtype">char</span> get_char(<span class="keyword">const</span> <span class="keywordtype">int</span> x) {</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// By adding 65 we are scaling 0-25 to 65-90. </span></div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// Which are in fact ASCII values of A-Z. </span></div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="keywordflow">return</span> char(x + 65); </div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> }</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> } </div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> get_value(<span class="keyword">const</span> <span class="keywordtype">char</span> c) {</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="comment">// A-Z have ASCII values in range 65-90.</span></div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="comment">// Hence subtracting 65 will scale them to 0-25.</span></div>
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@@ -144,7 +144,7 @@ $(function(){initNavTree('d6/d2c/caesar__cipher_8cpp_source.html','../../'); ini
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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">// Unnamed namespace</span></div>
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<div class="foldopen" id="foldopen00065" data-start="{" data-end="}">
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"><a class="line" href="../../d6/d2c/caesar__cipher_8cpp.html#ac3381121289548640b1c27a58a8524c3"> 65</a></span> std::string encrypt (<span class="keyword">const</span> std::string &text, <span class="keyword">const</span> <span class="keywordtype">int</span> &shift) {</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"><a class="line" href="../../d6/d2c/caesar__cipher_8cpp.html#ac3381121289548640b1c27a58a8524c3"> 65</a></span> std::string <a class="code hl_function" href="../../d6/d2c/caesar__cipher_8cpp.html#ac3381121289548640b1c27a58a8524c3">encrypt</a> (<span class="keyword">const</span> std::string &text, <span class="keyword">const</span> <span class="keywordtype">int</span> &shift) {</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> std::string encrypted_text = <span class="stringliteral">""</span>; <span class="comment">// Empty string to store encrypted text</span></div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keywordflow">for</span> (<span class="keywordtype">char</span> c : text) { <span class="comment">// Going through each character</span></div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keywordtype">int</span> place_value = get_value(c); <span class="comment">// Getting value of character (i.e. 0-25)</span></div>
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@@ -155,8 +155,9 @@ $(function(){initNavTree('d6/d2c/caesar__cipher_8cpp_source.html','../../'); ini
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordflow">return</span> encrypted_text; <span class="comment">// Returning encrypted text</span></div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> }</div>
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</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> </div>
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<div class="foldopen" id="foldopen00081" data-start="{" data-end="}">
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"><a class="line" href="../../d6/d2c/caesar__cipher_8cpp.html#a355e69511cd2006b5c4c80ae95b71056"> 81</a></span> std::string decrypt (<span class="keyword">const</span> std::string &text, <span class="keyword">const</span> <span class="keywordtype">int</span> &shift) {</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"><a class="line" href="../../d6/d2c/caesar__cipher_8cpp.html#a355e69511cd2006b5c4c80ae95b71056"> 81</a></span> std::string <a class="code hl_function" href="../../d6/d2c/caesar__cipher_8cpp.html#a355e69511cd2006b5c4c80ae95b71056">decrypt</a> (<span class="keyword">const</span> std::string &text, <span class="keyword">const</span> <span class="keywordtype">int</span> &shift) {</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> std::string decrypted_text = <span class="stringliteral">""</span>; <span class="comment">// Empty string to store decrypted text</span></div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keywordflow">for</span> (<span class="keywordtype">char</span> c : text) { <span class="comment">// Going through each character</span></div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> <span class="keywordtype">int</span> place_value = get_value(c); <span class="comment">// Getting value of character (i.e. 0-25)</span></div>
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@@ -172,28 +173,28 @@ $(function(){initNavTree('d6/d2c/caesar__cipher_8cpp_source.html','../../'); ini
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</div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> } <span class="comment">// namespace caesar</span></div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span>} <span class="comment">// namespace ciphers</span></div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> </div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span></div>
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<div class="foldopen" id="foldopen00100" data-start="{" data-end="}">
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"><a class="line" href="../../d6/d2c/caesar__cipher_8cpp.html#ae1a3968e7947464bee7714f6d43b7002"> 100</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="../../d6/d2c/caesar__cipher_8cpp.html#ae1a3968e7947464bee7714f6d43b7002">test</a>() {</div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> <span class="comment">// Test 1</span></div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> std::string text1 = <span class="stringliteral">"ALANTURING"</span>;</div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> std::string encrypted1 = ciphers::caesar::encrypt(text1, 17);</div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> std::string decrypted1 = ciphers::caesar::decrypt(encrypted1, 17);</div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> std::string encrypted1 = <a class="code hl_function" href="../../d6/d2c/caesar__cipher_8cpp.html#ac3381121289548640b1c27a58a8524c3">ciphers::caesar::encrypt</a>(text1, 17);</div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> std::string decrypted1 = <a class="code hl_function" href="../../d6/d2c/caesar__cipher_8cpp.html#a355e69511cd2006b5c4c80ae95b71056">ciphers::caesar::decrypt</a>(encrypted1, 17);</div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> assert(text1 == decrypted1);</div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> std::cout << <span class="stringliteral">"Original text : "</span> << text1;</div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> std::cout << <span class="stringliteral">" , Encrypted text (with shift = 21) : "</span> << encrypted1;</div>
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<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> std::cout << <span class="stringliteral">" , Decrypted text : "</span><< decrypted1 << std::endl;</div>
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<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="comment">// Test 2</span></div>
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<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> std::string text2 = <span class="stringliteral">"HELLOWORLD"</span>;</div>
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> std::string encrypted2 = ciphers::caesar::encrypt(text2, 1729);</div>
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> std::string decrypted2 = ciphers::caesar::decrypt(encrypted2, 1729);</div>
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> std::string encrypted2 = <a class="code hl_function" href="../../d6/d2c/caesar__cipher_8cpp.html#ac3381121289548640b1c27a58a8524c3">ciphers::caesar::encrypt</a>(text2, 1729);</div>
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> std::string decrypted2 = <a class="code hl_function" href="../../d6/d2c/caesar__cipher_8cpp.html#a355e69511cd2006b5c4c80ae95b71056">ciphers::caesar::decrypt</a>(encrypted2, 1729);</div>
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<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> assert(text2 == decrypted2);</div>
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<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> std::cout << <span class="stringliteral">"Original text : "</span> << text2;</div>
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<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> std::cout << <span class="stringliteral">" , Encrypted text (with shift = 1729) : "</span> << encrypted2;</div>
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<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> std::cout << <span class="stringliteral">" , Decrypted text : "</span><< decrypted2 << std::endl;</div>
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<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span>}</div>
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</div>
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<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> </div>
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<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span></div>
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<div class="foldopen" id="foldopen00120" data-start="{" data-end="}">
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<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"><a class="line" href="../../d6/d2c/caesar__cipher_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4"> 120</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="../../d6/d2c/caesar__cipher_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
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<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> <span class="comment">// Testing</span></div>
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@@ -201,18 +202,19 @@ $(function(){initNavTree('d6/d2c/caesar__cipher_8cpp_source.html','../../'); ini
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<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> <span class="keywordflow">return</span> 0;</div>
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<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span>}</div>
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</div>
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<div class="ttc" id="acaesar__cipher_8cpp_html_a355e69511cd2006b5c4c80ae95b71056"><div class="ttname"><a href="../../d6/d2c/caesar__cipher_8cpp.html#a355e69511cd2006b5c4c80ae95b71056">ciphers::caesar::decrypt</a></div><div class="ttdeci">std::string decrypt(const std::string &text, const int &shift)</div><div class="ttdef"><b>Definition</b> <a href="#l00081">caesar_cipher.cpp:81</a></div></div>
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<div class="ttc" id="acaesar__cipher_8cpp_html_ac3381121289548640b1c27a58a8524c3"><div class="ttname"><a href="../../d6/d2c/caesar__cipher_8cpp.html#ac3381121289548640b1c27a58a8524c3">ciphers::caesar::encrypt</a></div><div class="ttdeci">std::string encrypt(const std::string &text, const int &shift)</div><div class="ttdef"><b>Definition</b> <a href="#l00065">caesar_cipher.cpp:65</a></div></div>
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<div class="ttc" id="acaesar__cipher_8cpp_html_ae1a3968e7947464bee7714f6d43b7002"><div class="ttname"><a href="../../d6/d2c/caesar__cipher_8cpp.html#ae1a3968e7947464bee7714f6d43b7002">test</a></div><div class="ttdeci">void test()</div><div class="ttdef"><b>Definition</b> <a href="#l00100">caesar_cipher.cpp:100</a></div></div>
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<div class="ttc" id="acaesar__cipher_8cpp_html_ae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="../../d6/d2c/caesar__cipher_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdef"><b>Definition</b> <a href="#l00120">caesar_cipher.cpp:120</a></div></div>
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<div class="ttc" id="anamespacecaesar_html"><div class="ttname"><a href="../../dd/d81/namespacecaesar.html">caesar</a></div><div class="ttdoc">Functions for Caesar cipher algorithm.</div></div>
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<div class="ttc" id="anamespaceciphers_html"><div class="ttname"><a href="../../d6/d4e/namespaceciphers.html">ciphers</a></div><div class="ttdoc">Algorithms for encryption and decryption.</div></div>
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<div class="ttc" id="asha256_8cpp_html_a9e98c180d32b04aab6f767cb0c13e1da"><div class="ttname"><a href="../../d4/d08/sha256_8cpp.html#a9e98c180d32b04aab6f767cb0c13e1da">hashing::sha256::get_char</a></div><div class="ttdeci">char get_char(const std::string &input, std::size_t pos)</div><div class="ttdoc">Returns the character at pos after the input is padded.</div><div class="ttdef"><b>Definition</b> <a href="../../d4/d08/sha256_8cpp_source.html#l00170">sha256.cpp:170</a></div></div>
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</div><!-- fragment --></div><!-- contents -->
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