Add example images

d5798f11 · lang0909 · 235227d0 · d5798f11 · d5798f11 · d5798f11
Commit d5798f11 authored Aug 30, 2019 by lang0909
--- a/images/input_and_output1.jpg
+++ b/images/input_and_output1.jpg
--- a/images/input_and_output2.jpg
+++ b/images/input_and_output2.jpg
--- a/images/input_and_output3.jpg
+++ b/images/input_and_output3.jpg
--- a/images/tree-example.JPG
+++ b/images/tree-example.JPG