commit 552a469e4ff1a7ee91cbdee3bb817dddf9301772
Author: PlexSheep <software@cscherr.de>
Date:   Sat Jun 17 16:57:32 2023 +0200

    some working prolog

diff --git a/heights.pl b/heights.pl
new file mode 100644
index 0000000..f659160
--- /dev/null
+++ b/heights.pl
@@ -0,0 +1,13 @@
+/* facts */
+set_height(dave, 180).
+set_height(alice, 155).
+set_height(bob, 176).
+set_height(mary, 166).
+set_height(phi, 166).
+set_height(tom, 32).
+
+/* rules */
+taller_than(X, Y) :- set_height(X, XH), set_height(Y, YH), XH < YH.
+smaller_than(X, Y) :- set_height(X, XH), set_height(Y, YH), XH > YH.
+same_height(X, Y) :- set_height(X, XH), set_height(Y, YH), XH = YH.
+size(X) :- set_height(X, XH), write(X), write(' is '), write(XH), write(' cm tall!').