diff --git a/2-4.py b/2-4.py new file mode 100644 index 0000000..e69de29 diff --git a/2-4dianhua.py b/2-4dianhua.py new file mode 100644 index 0000000..e69de29 diff --git a/2-4kechengbiao.py b/2-4kechengbiao.py new file mode 100644 index 0000000..e69de29