readme

edadma · Dec 25, 2018 · 2c25527 · 2c25527
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diff --git a/README.md b/README.md
@@ -64,6 +64,22 @@ grandmother( X, Y ) :- female( X ), grandparent( X, Y ).
 grandfather( X, Y ) :- male( X ), grandparent( X, Y ).
 ```
 
+This example is contained in the repo as `examples/family_tree`.  Run the REPL (repeat-evaluate-print-loop) and type
+
+    ;l examples/family_tree
+
+to load the example.  To get a list of all the persons in the family tree who are fathers, type
+
+    father( X, _ )*
+
+#### Output
+
+X = don
+
+X = liam
+
+X = logan
+
 ### Library
 
 This example program shows how to 

diff --git a/code/bubble_sort.prolog → examples/bubble_sort.prolog b/code/bubble_sort.prolog → examples/bubble_sort.prolog
diff --git a/code/courses.prolog → examples/courses.prolog b/code/courses.prolog → examples/courses.prolog
diff --git a/code/dcgxpand.prolog → examples/dcgxpand.prolog b/code/dcgxpand.prolog → examples/dcgxpand.prolog
diff --git a/code/family_tree.prolog → examples/family_tree.prolog b/code/family_tree.prolog → examples/family_tree.prolog
diff --git a/code/hello.prolog → examples/hello.prolog b/code/hello.prolog → examples/hello.prolog
diff --git a/code/lists.prolog → examples/lists.prolog b/code/lists.prolog → examples/lists.prolog
diff --git a/code/quick_sort.prolog → examples/quick_sort.prolog b/code/quick_sort.prolog → examples/quick_sort.prolog
diff --git a/code/tour.prolog → examples/tour.prolog b/code/tour.prolog → examples/tour.prolog