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<div data-externalstyle="false" dir="ltr" style="font-family: 'Calibri', 'Segoe UI', 'Meiryo', 'Microsoft YaHei UI', 'Microsoft JhengHei UI', 'Malgun Gothic', 'sans-serif';font-size:12pt;"><div>I’m using GHCi in a Haskell version 7.10.2 and using this fragmente of coding:</div><div><br></div><div>data ArvBinA t = Folha t | No Int (ArvBinA t) (ArvBinA t) deriving (Eq, Ord, Show)</div><div><br></div><div>arvbina = No 4 (No 2 (Folha 14) (Folha 09)) (No 2 (Folha 19) (Folha 51))</div><div><br></div><div>tamArvBinA :: ArvBinA t -> Int<br>tamArvBinA (Folha x) = 1<br>tamArvBinA (No n xt yt) = n</div><div><br></div><div>rotula :: ArvBinA t -> ArvBinA t -> ArvBinA t<br>rotula ae ad<br> = No n ae ad where n = (tamArvBinA ae) + (tamArvBinA ad)</div><div><br></div><div>listoArvBinA :: (Eq t) => [t] -> ArvBinA t<br>listoArvBinA xs<br> |m == 0 = Folha (head xs)<br> |otherwise = rotula (listoArvBinA xse) (listoArvBinA xsd)<br> where m = (length xs) `div` 2 <br> (xse, xsd) = (take m xs, drop m xs) </div><div><br></div><div>After compiling there is this message: </div><div><br></div><div>parse error on input ‘=’. </div><div><br></div><div>There is someone that he/she can help me? I think that’is na error by clause where and the offside rule, or so, but I’m not right of this.</div><div><br></div><div>Thanks in advance for some help</div><div>Francisco Vieira<br></div><div data-signatureblock="true"><div><br></div><div>Enviado do Email do Windows</div><div><br></div></div></div>
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