title: Error: add explicit braces to avoid dangling else. C
body: <p>I'm using gedit and my complier is clang.
  I've been getting a couple of these errors recently and not sure how to fix (error in title and referring to the else statement).</p>
  
  <pre><code> if(isupper(ptext[i]))
              if ((((ptext[i]+k)%26)+52) &lt; 65 || (((ptext[i]+k)%26)+52) &gt; 90)
              {
                  printf("%c", (((ptext[i]+k)%26)+78));
              }
              else
              {
                  printf("%c", (((ptext[i]+k)%26)+52));
              }
  </code></pre>
  
  <p>What should I add/remove/fix? 
  Thanks in advance :)</p>