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Diffstat (limited to 'ch03')
| -rw-r--r-- | ch03/3_b_9.hs | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/ch03/3_b_9.hs b/ch03/3_b_9.hs new file mode 100644 index 0000000..c6595de --- /dev/null +++ b/ch03/3_b_9.hs @@ -0,0 +1,9 @@ +-- Consider three two-dimensional points a, b, and c. If we look at the angle +-- formed by the line segment from a to b and the line segment from b to c, it +-- either turns left, turns right, or forms a straight line. Define a Direction +-- data type that lets you represent these possibilities. + +data Direction = DLeft + | DRight + | DStraight + deriving (Show) |