title: How can I get console output in code block IDE
body: <p>My code has everything ok! But I don't get any output on the console. 
  This is my code:</p>
  
  <pre><code>#include &lt;stdio.h&gt;
  #include &lt;stdlib.h&gt;
  
  int main()
  {
      printf("Hello world!\n");
      return 0;
  }
  </code></pre>