No space before first ``('', one space after ``)'' before ``{'', ``case'' moved for one space, code moved usually - 2 spaces. Comments about ``case'' in one line with it.
case 1: // case comment
...
<code>
...
break;
case 2: // case comment
...
<code>
...
break;
default: // default comment
...
<code>
...
break;
}