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eccstartup/nplusk.hs

Created March 20, 2017 02:10
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nplusk.hs
{-# LANGUAGE NPlusKPatterns #-}
f1 0 = 0
f1 (n+1) = n+1 + f1 n
f2 0 = 0
f2 (n+2) = n+2 + f2 (n+1)
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*Main> f1 2
3
*Main> f2 2
*** Exception: nplusk.hs:(6,1)-(7,25): Non-exhaustive patterns in function f2

*Main> f2 1
*** Exception: nplusk.hs:(6,1)-(7,25): Non-exhaustive patterns in function f2

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