Hello,<br><br>&nbsp;&nbsp;&nbsp; I am writing a function(actually much more than this):<br><br>bozo :: Char -&gt; Char <br>bozo 0x02 = &#39;a&#39;<br>...<br><br>However, I get complaints from ghc suggesting that I should add an &quot;instance declaration (Num, Char).  I (mistaking) thought I understood the Haskell class hierarchy and the associated constraints .. but apparently not .. =&gt; help please. Should 
<br><br>Kind regards, Vasya<br>