title: Why can't I use EXIT_SUCCESS instead of 0 in the return statement in Visual Studio Code?
body: <p>Why can't I use EXIT_SUCCESS instead of 0 in the return statement in Visual Studio Code? I get the error:</p>
  <blockquote>
  <p>id &quot;EXIT_SUCCESS&quot; is not defined</p>
  </blockquote>
  <pre><code>#include &lt;stdio.h&gt;
  
  int main(void)
  {
      puts(&quot;Thanks for help&quot;);
      return EXIT_SUCCESS; /*problem*/
  }
  </code></pre>