ashutosh dimri wrote:
func [] = []
func (x:xs)
|(ord x > 57) = ((ord x)-87):func xs
|otherwise = ((ord x)-48):func xs
Your problem is with the type of 'func'.
*Main> :t func
func :: [Char] -> [Int]
'Int' is a 32-bit type, on most systems. The thing that has forced your
type to Int is your use of ord, because ord is defined to produce Ints:
*Main> :t ord
ord :: Char -> Int
We can use 'fromIntegral' to convert an Int to any other numeric type:
func [] = []
func (x:xs)
|(ord x > 57) = ((fromIntegral.ord $ x)-87):func xs
|otherwise = ((fromIntegral.ord $ x)-48):func xs
And now 'func' has the more general type:
*Main> :t func
func :: (Num a) => [Char] -> [a]
(i.e. func works on any numeric type 'a').
and now it works for you on very large values:
*Main> mul.func $ "eeeeeeeeee"
1026210852590
Hope that helps,
Jules
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