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<div class="headertitle"><div class="title">sparse_matrix.cpp File Reference</div></div>
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<div class="textblock"><code>#include &lt;iostream&gt;</code><br />
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Include dependency graph for sparse_matrix.cpp:</div>
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Functions</h2></td></tr>
<tr class="memitem:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d3/d19/sparse__matrix_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a> ()</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<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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<h2 class="memtitle"><span class="permalink"><a href="#ae66f6b31b5ad750f1fe042a706a4e3d4">&#9670;&nbsp;</a></span>main()</h2>
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<td class="memname">int main </td>
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<td class="paramtype">void&#160;</td>
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<p >main function </p>
<div class="fragment"><div class="line"><span class="lineno"> 9</span> {</div>
<div class="line"><span class="lineno"> 10</span> <span class="keywordtype">int</span> m, n;</div>
<div class="line"><span class="lineno"> 11</span> <span class="keywordtype">int</span> counterZeros = 0;</div>
<div class="line"><span class="lineno"> 12</span> </div>
<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> &lt;&lt; <span class="stringliteral">&quot;Enter dimensions of matrix (seperated with space): &quot;</span>;</div>
<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> &gt;&gt; m;</div>
<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> &gt;&gt; n;</div>
<div class="line"><span class="lineno"> 16</span> </div>
<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>
<div class="line"><span class="lineno"> 18</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; m; i++) a[i] = <span class="keyword">new</span> <span class="keywordtype">int</span>[n];</div>
<div class="line"><span class="lineno"> 19</span> </div>
<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> &lt;&lt; <span class="stringliteral">&quot;Enter matrix elements:&quot;</span>;</div>
<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> &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 22</span> </div>
<div class="line"><span class="lineno"> 23</span> <span class="comment">// reads the matrix from stdin</span></div>
<div class="line"><span class="lineno"> 24</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; m; i++) {</div>
<div class="line"><span class="lineno"> 25</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; n; j++) {</div>
<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> &lt;&lt; <span class="stringliteral">&quot;element? &quot;</span>;</div>
<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> &gt;&gt; a[i][j];</div>
<div class="line"><span class="lineno"> 28</span> }</div>
<div class="line"><span class="lineno"> 29</span> }</div>
<div class="line"><span class="lineno"> 30</span> </div>
<div class="line"><span class="lineno"> 31</span> <span class="comment">// counts the zero&#39;s</span></div>
<div class="line"><span class="lineno"> 32</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; m; i++) {</div>
<div class="line"><span class="lineno"> 33</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; n; j++) {</div>
<div class="line"><span class="lineno"> 34</span> <span class="keywordflow">if</span> (a[i][j] == 0)</div>
<div class="line"><span class="lineno"> 35</span> counterZeros++; <span class="comment">// Counting number of zeroes</span></div>
<div class="line"><span class="lineno"> 36</span> }</div>
<div class="line"><span class="lineno"> 37</span> }</div>
<div class="line"><span class="lineno"> 38</span> </div>
<div class="line"><span class="lineno"> 39</span> <span class="comment">// makes sure the matrix is a sparse matrix</span></div>
<div class="line"><span class="lineno"> 40</span> <span class="keywordflow">if</span> (counterZeros &gt; ((m * n) / 2)) <span class="comment">// Checking for sparse matrix</span></div>
<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> &lt;&lt; <span class="stringliteral">&quot;Sparse matrix&quot;</span>;</div>
<div class="line"><span class="lineno"> 42</span> <span class="keywordflow">else</span></div>
<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> &lt;&lt; <span class="stringliteral">&quot;Not a sparse matrix&quot;</span>;</div>
<div class="line"><span class="lineno"> 44</span> </div>
<div class="line"><span class="lineno"> 45</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; m; i++) <span class="keyword">delete</span>[] a[i];</div>
<div class="line"><span class="lineno"> 46</span> <span class="keyword">delete</span>[] a;</div>
<div class="line"><span class="lineno"> 47</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 48</span>}</div>
<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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