Hello,

I have to find the center of 2 points as a assigment for a course on fpcomplete. This is no homework because I do a self-study. 

So I did  this:

center (x1,y1) (x2,y2) = ( ((x1+x2)/2),((y1+y2)/2) )
main = print $ center ((1,2), (3, 4))

but now I see this error message :
 

Main.hs@2:8-2:13

• No instance for (Show (((t0, t1), (t2, t3)) -> ((t0, t1), (t2, t3)))) arising from a use of `print' Possible fix: add an instance declaration for (Show (((t0, t1), (t2, t3)) -> ((t0, t1), (t2, t3)))) In the expression: print In the expression: print $ center ((1, 2), (3, 4)) In an equation for `main': main = print $ center ((1, 2), (3, 4))

Roelof

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