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POA simple "for" command doesnt work using only the stdio library
 

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  1. POA simple "for" command doesnt work using only the stdio library
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    <p>Using the same machine and IDE as reffered in my other question (third paragraph at <a href="https://stackoverflow.com/questions/13987812/problems-in-code-or-my-ide-comp-is-bugged">Problems in code or my IDE/comp is bugged?</a>)</p> <p>I try to run this code:</p> <pre><code>#include &lt;stdio.h&gt; #define n 3 int main() { int i; float values[n],sumval,svmean,tmp; for(i=0;i&lt;n;++i) { scanf("%f",&amp;tmp); values[i]=tmp; sumval = sumval + values[i]; } svmean = sumval/n; printf("%f \n",svmean); return(0); } </code></pre> <p>The above code is supposed to run this formula </p> <p><img src="https://i.stack.imgur.com/EqaJv.jpg" alt="http://img850.imageshack.us/img850/6894/95871186.jpg"></p> <p>That means that it has to add some values and divide the result by their total number.</p> <p>As you see above I made an array with random <code>n</code> positions and I ask the user to fill in a value for each position then add them all up and divide them.</p> <p>The problem is that it doesnt work. It outputs only the result 7 no matter what the iput is.</p> <p>BUT if I include stdlib.h to the code it works fine.</p> <p>so</p> <ul> <li><strong>Question A</strong>: why the code does not work properly using only the stdio.h library? which element of the code does require the stdlib.h library?</li> </ul> <p>As you see the array <code>values[n]</code> seems to have an random <code>n</code> number of cells but actually I have already set this numer to be equal to 3 (using <code>#define</code>)</p> <ul> <li><strong>Question B</strong>: Is there a way to run a code with the same porpuse but letting the user to define the size of the array <code>values[n]</code> or in other words let the user input an integer that sets the value of <code>n</code> in <code>values[n]</code>?</li> </ul>
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