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<title>Algorithms_in_C++: others/sparse_matrix.cpp File Reference</title>
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<div id="projectname">Algorithms_in_C++<span id="projectnumber"> 1.0.0</span>
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<div id="projectname">TheAlgorithms/C++<span id="projectnumber"> 1.0.0</span>
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<div id="projectbrief">Set of algorithms implemented in C++.</div>
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@@ -115,7 +132,9 @@ Include dependency graph for sparse_matrix.cpp:</div>
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<div class="dyncontent">
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<div class="center"><iframe scrolling="no" frameborder="0" src="../../d6/dbc/sparse__matrix_8cpp__incl.svg" width="179" height="111"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe></div>
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<p><a href="../../d3/d19/sparse__matrix_8cpp_source.html">Go to the source code of this file.</a></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:ae66f6b31b5ad750f1fe042a706a4e3d4" id="r_ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a> ()</td></tr>
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@@ -123,6 +142,8 @@ Functions</h2></td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>A sparse matrix is a matrix which has number of zeroes greater than \(\frac{m\times n}{2}\), where m and n are the dimensions of the matrix. </p>
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<p class="definition">Definition in file <a class="el" href="../../d3/d19/sparse__matrix_8cpp_source.html">sparse_matrix.cpp</a>.</p>
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</div><h2 class="groupheader">Function Documentation</h2>
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<a id="ae66f6b31b5ad750f1fe042a706a4e3d4" name="ae66f6b31b5ad750f1fe042a706a4e3d4"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#ae66f6b31b5ad750f1fe042a706a4e3d4">◆ </a></span>main()</h2>
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@@ -139,25 +160,27 @@ Functions</h2></td></tr>
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</table>
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</div><div class="memdoc">
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<p>main function </p>
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<p class="definition">Definition at line <a class="el" href="../../d3/d19/sparse__matrix_8cpp_source.html#l00009">9</a> of file <a class="el" href="../../d3/d19/sparse__matrix_8cpp_source.html">sparse_matrix.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 9</span> {</div>
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<div class="line"><span class="lineno"> 10</span> <span class="keywordtype">int</span> m, n;</div>
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<div class="line"><span class="lineno"> 11</span> <span class="keywordtype">int</span> counterZeros = 0;</div>
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<div class="line"><span class="lineno"> 12</span> </div>
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<div class="line"><span class="lineno"> 13</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <span class="stringliteral">"Enter dimensions of matrix (seperated with space): "</span>;</div>
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<div class="line"><span class="lineno"> 14</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a> >> m;</div>
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<div class="line"><span class="lineno"> 15</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a> >> n;</div>
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<div class="line"><span class="lineno"> 13</span> std::cout << <span class="stringliteral">"Enter dimensions of matrix (seperated with space): "</span>;</div>
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<div class="line"><span class="lineno"> 14</span> std::cin >> m;</div>
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<div class="line"><span class="lineno"> 15</span> std::cin >> n;</div>
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<div class="line"><span class="lineno"> 16</span> </div>
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<div class="line"><span class="lineno"> 17</span> <span class="keywordtype">int</span> **a = <span class="keyword">new</span> <span class="keywordtype">int</span> *[m];</div>
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<div class="line"><span class="lineno"> 18</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < m; i++) a[i] = <span class="keyword">new</span> <span class="keywordtype">int</span>[n];</div>
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<div class="line"><span class="lineno"> 19</span> </div>
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<div class="line"><span class="lineno"> 20</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <span class="stringliteral">"Enter matrix elements:"</span>;</div>
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<div class="line"><span class="lineno"> 21</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <span class="stringliteral">"\n"</span>;</div>
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<div class="line"><span class="lineno"> 20</span> std::cout << <span class="stringliteral">"Enter matrix elements:"</span>;</div>
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<div class="line"><span class="lineno"> 21</span> std::cout << <span class="stringliteral">"\n"</span>;</div>
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<div class="line"><span class="lineno"> 22</span> </div>
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<div class="line"><span class="lineno"> 23</span> <span class="comment">// reads the matrix from stdin</span></div>
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<div class="line"><span class="lineno"> 24</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < m; i++) {</div>
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<div class="line"><span class="lineno"> 25</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < n; j++) {</div>
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<div class="line"><span class="lineno"> 26</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <span class="stringliteral">"element? "</span>;</div>
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<div class="line"><span class="lineno"> 27</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a> >> a[i][j];</div>
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<div class="line"><span class="lineno"> 26</span> std::cout << <span class="stringliteral">"element? "</span>;</div>
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<div class="line"><span class="lineno"> 27</span> std::cin >> a[i][j];</div>
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<div class="line"><span class="lineno"> 28</span> }</div>
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<div class="line"><span class="lineno"> 29</span> }</div>
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<div class="line"><span class="lineno"> 30</span> </div>
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<div class="line"><span class="lineno"> 38</span> </div>
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<div class="line"><span class="lineno"> 39</span> <span class="comment">// makes sure the matrix is a sparse matrix</span></div>
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<div class="line"><span class="lineno"> 40</span> <span class="keywordflow">if</span> (counterZeros > ((m * n) / 2)) <span class="comment">// Checking for sparse matrix</span></div>
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<div class="line"><span class="lineno"> 41</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <span class="stringliteral">"Sparse matrix"</span>;</div>
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<div class="line"><span class="lineno"> 41</span> std::cout << <span class="stringliteral">"Sparse matrix"</span>;</div>
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<div class="line"><span class="lineno"> 42</span> <span class="keywordflow">else</span></div>
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<div class="line"><span class="lineno"> 43</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <span class="stringliteral">"Not a sparse matrix"</span>;</div>
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<div class="line"><span class="lineno"> 43</span> std::cout << <span class="stringliteral">"Not a sparse matrix"</span>;</div>
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<div class="line"><span class="lineno"> 44</span> </div>
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<div class="line"><span class="lineno"> 45</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < m; i++) <span class="keyword">delete</span>[] a[i];</div>
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<div class="line"><span class="lineno"> 46</span> <span class="keyword">delete</span>[] a;</div>
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<div class="line"><span class="lineno"> 47</span> <span class="keywordflow">return</span> 0;</div>
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<div class="line"><span class="lineno"> 48</span>}</div>
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<div class="ttc" id="abasic_istream_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a></div></div>
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<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>
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</div><!-- fragment -->
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</div>
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</div>
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