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<p>Read integers from stdin continuously as they are entered without waiting for the <code>\n</code> character.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;iostream&gt;</code><br />
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Include dependency graph for fast_integer_input.cpp:</div>
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Functions</h2></td></tr>
<tr class="memitem:a4e097ac8509b717bdc8ab09ecd86ae82" id="r_a4e097ac8509b717bdc8ab09ecd86ae82"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a4e097ac8509b717bdc8ab09ecd86ae82">fastinput</a> (int *number)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Read integers from stdin continuously as they are entered without waiting for the <code>\n</code> character. </p>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a4e097ac8509b717bdc8ab09ecd86ae82" name="a4e097ac8509b717bdc8ab09ecd86ae82"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a4e097ac8509b717bdc8ab09ecd86ae82">&#9670;&#160;</a></span>fastinput()</h2>
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<td class="memname">void fastinput </td>
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<td class="paramtype">int *</td> <td class="paramname"><span class="paramname"><em>number</em></span></td><td>)</td>
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<p>Function to read the number from stdin. The function reads input until a non numeric character is entered. </p>
<div class="fragment"><div class="line"><span class="lineno"> 11</span> {</div>
<div class="line"><span class="lineno"> 12</span> <span class="comment">// variable to indicate sign of input integer</span></div>
<div class="line"><span class="lineno"> 13</span> <span class="keywordtype">bool</span> negative = <span class="keyword">false</span>;</div>
<div class="line"><span class="lineno"> 14</span> <span class="keyword">register</span> <span class="keywordtype">int</span> c;</div>
<div class="line"><span class="lineno"> 15</span> *number = 0;</div>
<div class="line"><span class="lineno"> 16</span> </div>
<div class="line"><span class="lineno"> 17</span> <span class="comment">// extract current character from buffer</span></div>
<div class="line"><span class="lineno"> 18</span> c = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/c/getchar.html">std::getchar</a>();</div>
<div class="line"><span class="lineno"> 19</span> <span class="keywordflow">if</span> (c == <span class="charliteral">&#39;-&#39;</span>) {</div>
<div class="line"><span class="lineno"> 20</span> <span class="comment">// number is negative</span></div>
<div class="line"><span class="lineno"> 21</span> negative = <span class="keyword">true</span>;</div>
<div class="line"><span class="lineno"> 22</span> </div>
<div class="line"><span class="lineno"> 23</span> <span class="comment">// extract the next character from the buffer</span></div>
<div class="line"><span class="lineno"> 24</span> c = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/c/getchar.html">std::getchar</a>();</div>
<div class="line"><span class="lineno"> 25</span> }</div>
<div class="line"><span class="lineno"> 26</span> </div>
<div class="line"><span class="lineno"> 27</span> <span class="comment">// Keep on extracting characters if they are integers</span></div>
<div class="line"><span class="lineno"> 28</span> <span class="comment">// i.e ASCII Value lies from &#39;0&#39;(48) to &#39;9&#39; (57)</span></div>
<div class="line"><span class="lineno"> 29</span> <span class="keywordflow">for</span> (; (c &gt; 47 &amp;&amp; c &lt; 58); c = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/c/getchar.html">std::getchar</a>())</div>
<div class="line"><span class="lineno"> 30</span> *number = *number * 10 + c - 48;</div>
<div class="line"><span class="lineno"> 31</span> </div>
<div class="line"><span class="lineno"> 32</span> <span class="comment">// if scanned input has a negative sign, negate the</span></div>
<div class="line"><span class="lineno"> 33</span> <span class="comment">// value of the input number</span></div>
<div class="line"><span class="lineno"> 34</span> <span class="keywordflow">if</span> (negative)</div>
<div class="line"><span class="lineno"> 35</span> *(number) *= -1;</div>
<div class="line"><span class="lineno"> 36</span>}</div>
<div class="ttc" id="agetchar_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/c/getchar.html">std::getchar</a></div><div class="ttdeci">T getchar(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>
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<p>Main function </p>
<div class="fragment"><div class="line"><span class="lineno"> 39</span> {</div>
<div class="line"><span class="lineno"> 40</span> <span class="keywordtype">int</span> number;</div>
<div class="line"><span class="lineno"> 41</span> <a class="code hl_function" href="#a4e097ac8509b717bdc8ab09ecd86ae82">fastinput</a>(&amp;number);</div>
<div class="line"><span class="lineno"> 42</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; number &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"> 43</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 44</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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