title: scanf does not ask for input
body: <p>It takes a lot of time to compile, and some random number shows up, apparently the <code>scanf()</code> doesn't ask for the input</p>
  
  <pre><code>#include &lt;stdio.h&gt;
  
  int main() {
  
      int a;
      //a =  1472464;
      scanf ("%d", &amp;a);
          if ((a % 6) &amp;&amp; (a %4) == 0)
          {
              printf("Input %d is divisible by 6 and 4\n", a);
          }
          else {
              printf(" Input %d is not divisible by 6 and 4\n", a);
          }
      printf("Hello, World!\n");
      return 0;
  }
  </code></pre>