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<p>Print the elements of a matrix traversing it spirally.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;iostream&gt;</code><br />
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Include dependency graph for spiral_print.cpp:</div>
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Functions</h2></td></tr>
<tr class="memitem:acfff36db81326fb990a643ab198ee8a5"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../db/d07/spiral__print_8cpp.html#acfff36db81326fb990a643ab198ee8a5">genArray</a> (int **a, int r, int c)</td></tr>
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<tr class="memitem:a850d3f55e1a8d227176cdcc67352c197"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../db/d07/spiral__print_8cpp.html#a850d3f55e1a8d227176cdcc67352c197">spiralPrint</a> (int **a, int r, int c)</td></tr>
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<tr class="memitem:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../db/d07/spiral__print_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>Print the elements of a matrix traversing it spirally. </p>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="acfff36db81326fb990a643ab198ee8a5" name="acfff36db81326fb990a643ab198ee8a5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#acfff36db81326fb990a643ab198ee8a5">&#9670;&#160;</a></span>genArray()</h2>
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<td class="memname">void genArray </td>
<td>(</td>
<td class="paramtype">int **&#160;</td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>r</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>c</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Arrange sequence of numbers from '1' in a matrix form </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[out]</td><td class="paramname">a</td><td>matrix to fill </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">r</td><td>number of rows </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">c</td><td>number of columns </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><span class="lineno"> 12</span> {</div>
<div class="line"><span class="lineno"> 13</span> <span class="keywordtype">int</span> value = 1;</div>
<div class="line"><span class="lineno"> 14</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; r; i++) {</div>
<div class="line"><span class="lineno"> 15</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; c; j++) {</div>
<div class="line"><span class="lineno"> 16</span> a[i][j] = value;</div>
<div class="line"><span class="lineno"> 17</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; a[i][j] &lt;&lt; <span class="stringliteral">&quot; &quot;</span>;</div>
<div class="line"><span class="lineno"> 18</span> value++;</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; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><span class="lineno"> 21</span> }</div>
<div class="line"><span class="lineno"> 22</span>}</div>
<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>
<div class="ttc" id="aendl_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a></div><div class="ttdeci">T endl(T... args)</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#ae66f6b31b5ad750f1fe042a706a4e3d4">&#9670;&#160;</a></span>main()</h2>
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<td class="memname">int main </td>
<td>(</td>
<td class="paramtype">void&#160;</td>
<td class="paramname"></td><td>)</td>
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<p>main function </p>
<div class="fragment"><div class="line"><span class="lineno"> 69</span> {</div>
<div class="line"><span class="lineno"> 70</span> <span class="keywordtype">int</span> r, c;</div>
<div class="line"><span class="lineno"> 71</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a> &gt;&gt; r &gt;&gt; c;</div>
<div class="line"><span class="lineno"> 72</span> <span class="keywordtype">int</span> **a = <span class="keyword">new</span> <span class="keywordtype">int</span> *[r];</div>
<div class="line"><span class="lineno"> 73</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; r; i++) a[i] = <span class="keyword">new</span> <span class="keywordtype">int</span>[c];</div>
<div class="line"><span class="lineno"> 74</span> </div>
<div class="line"><span class="lineno"> 75</span> <a class="code hl_function" href="../../db/d07/spiral__print_8cpp.html#acfff36db81326fb990a643ab198ee8a5">genArray</a>(a, r, c);</div>
<div class="line"><span class="lineno"> 76</span> <a class="code hl_function" href="../../db/d07/spiral__print_8cpp.html#a850d3f55e1a8d227176cdcc67352c197">spiralPrint</a>(a, r, c);</div>
<div class="line"><span class="lineno"> 77</span> </div>
<div class="line"><span class="lineno"> 78</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; r; i++) <span class="keyword">delete</span>[] a[i];</div>
<div class="line"><span class="lineno"> 79</span> <span class="keyword">delete</span>[] a;</div>
<div class="line"><span class="lineno"> 80</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 81</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>
<div class="ttc" id="aspiral__print_8cpp_html_a850d3f55e1a8d227176cdcc67352c197"><div class="ttname"><a href="../../db/d07/spiral__print_8cpp.html#a850d3f55e1a8d227176cdcc67352c197">spiralPrint</a></div><div class="ttdeci">void spiralPrint(int **a, int r, int c)</div><div class="ttdef"><b>Definition</b> spiral_print.cpp:29</div></div>
<div class="ttc" id="aspiral__print_8cpp_html_acfff36db81326fb990a643ab198ee8a5"><div class="ttname"><a href="../../db/d07/spiral__print_8cpp.html#acfff36db81326fb990a643ab198ee8a5">genArray</a></div><div class="ttdeci">void genArray(int **a, int r, int c)</div><div class="ttdef"><b>Definition</b> spiral_print.cpp:12</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a850d3f55e1a8d227176cdcc67352c197">&#9670;&#160;</a></span>spiralPrint()</h2>
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<td class="memname">void spiralPrint </td>
<td>(</td>
<td class="paramtype">int **&#160;</td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>r</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>c</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Traverse the matrix spirally and print the sequence of elements </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">a</td><td>matrix to read from </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">r</td><td>number of rows </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">c</td><td>number of columns </td></tr>
</table>
</dd>
</dl>
<p>Print start row</p>
<p>Print the end col</p>
<p>Print the end row</p>
<p>Print the start Col</p>
<div class="fragment"><div class="line"><span class="lineno"> 29</span> {</div>
<div class="line"><span class="lineno"> 30</span> <span class="keywordtype">int</span> startRow = 0, endRow = r - 1;</div>
<div class="line"><span class="lineno"> 31</span> <span class="keywordtype">int</span> startCol = 0, endCol = c - 1;</div>
<div class="line"><span class="lineno"> 32</span> <span class="keywordtype">int</span> cnt = 0;</div>
<div class="line"><span class="lineno"> 33</span> </div>
<div class="line"><span class="lineno"> 34</span> <span class="keywordflow">while</span> (startRow &lt;= endRow &amp;&amp; startCol &lt;= endCol) {<span class="comment"></span></div>
<div class="line"><span class="lineno"> 35</span><span class="comment"> /// Print start row</span></div>
<div class="line"><span class="lineno"> 36</span><span class="comment"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = startCol; i &lt;= endCol; i++, cnt++) {</div>
<div class="line"><span class="lineno"> 37</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; a[startRow][i] &lt;&lt; <span class="stringliteral">&quot; &quot;</span>;</div>
<div class="line"><span class="lineno"> 38</span> }</div>
<div class="line"><span class="lineno"> 39</span> startRow++;</div>
<div class="line"><span class="lineno"> 40</span><span class="comment"></span> </div>
<div class="line"><span class="lineno"> 41</span><span class="comment"> /// Print the end col</span></div>
<div class="line"><span class="lineno"> 42</span><span class="comment"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = startRow; i &lt;= endRow; i++, cnt++) {</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; a[i][endCol] &lt;&lt; <span class="stringliteral">&quot; &quot;</span>;</div>
<div class="line"><span class="lineno"> 44</span> }</div>
<div class="line"><span class="lineno"> 45</span> endCol--;</div>
<div class="line"><span class="lineno"> 46</span><span class="comment"></span> </div>
<div class="line"><span class="lineno"> 47</span><span class="comment"> /// Print the end row</span></div>
<div class="line"><span class="lineno"> 48</span><span class="comment"></span> <span class="keywordflow">if</span> (cnt == r * c) {</div>
<div class="line"><span class="lineno"> 49</span> <span class="keywordflow">break</span>;</div>
<div class="line"><span class="lineno"> 50</span> }</div>
<div class="line"><span class="lineno"> 51</span> </div>
<div class="line"><span class="lineno"> 52</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = endCol; i &gt;= startCol; i--, cnt++) {</div>
<div class="line"><span class="lineno"> 53</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; a[endRow][i] &lt;&lt; <span class="stringliteral">&quot; &quot;</span>;</div>
<div class="line"><span class="lineno"> 54</span> }</div>
<div class="line"><span class="lineno"> 55</span> endRow--;</div>
<div class="line"><span class="lineno"> 56</span><span class="comment"></span> </div>
<div class="line"><span class="lineno"> 57</span><span class="comment"> /// Print the start Col</span></div>
<div class="line"><span class="lineno"> 58</span><span class="comment"></span> <span class="keywordflow">if</span> (cnt == r * c) {</div>
<div class="line"><span class="lineno"> 59</span> <span class="keywordflow">break</span>;</div>
<div class="line"><span class="lineno"> 60</span> }</div>
<div class="line"><span class="lineno"> 61</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = endRow; i &gt;= startRow; i--, cnt++) {</div>
<div class="line"><span class="lineno"> 62</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; a[i][startCol] &lt;&lt; <span class="stringliteral">&quot; &quot;</span>;</div>
<div class="line"><span class="lineno"> 63</span> }</div>
<div class="line"><span class="lineno"> 64</span> startCol++;</div>
<div class="line"><span class="lineno"> 65</span> }</div>
<div class="line"><span class="lineno"> 66</span>}</div>
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