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Diffstat (limited to 'testsuite/tests/numeric/should_run/arith008.hs')
| -rw-r--r-- | testsuite/tests/numeric/should_run/arith008.hs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/testsuite/tests/numeric/should_run/arith008.hs b/testsuite/tests/numeric/should_run/arith008.hs new file mode 100644 index 0000000000..15a3903a0e --- /dev/null +++ b/testsuite/tests/numeric/should_run/arith008.hs @@ -0,0 +1,24 @@ +-- !!! a random test from Nick North +-- (got this in mid-1993; don't remember why. WDP 95/02) +-- + +random_numbers :: (Int, Int, Int) -> [Float] +random_numbers (s1,s2,s3) + = map (snd . properFraction . combine) (iterate f (s1,s2,s3)) + where + combine :: (Int,Int,Int) -> Float + combine (a,b,c) = + fromIntegral(a)/30269 + fromIntegral(b)/30307 + + fromIntegral(c)/30323 + f (a,b,c) = + ((171*a) `mod` 30269, (172*b) `mod` 30307, (170*c) `mod` 30323) + +-- partain: changed to cvt spaces into newlines (easier to see bugs) +-- sof: define approp. version of showList to do this. +main = putStr (showL (showsPrec 0) (take 1000 (random_numbers (9807, 65, 32975))) "\n") + +showL showx [] = showString "[]" +showL showx (x:xs) = showChar '[' . showx x . showl xs + where + showl [] = showChar ']' + showl (x:xs) = showString ",\n" . showx x . showl xs |