diff --git a/README.md b/README.md
index 6b89f07..f168c53 100644
--- a/README.md
+++ b/README.md
@@ -358,6 +358,8 @@ Step 3: if 打开文件失败 then 提示打开文件失败并结束
Step 4: 将所有库存记录写入文件
Step 5: 关闭文件
+! [](/mm.drawio.svg)
+
#### print_data
Step 1: 输出学号、姓名、成绩
@@ -396,7 +398,7 @@ Step 4: 提示删除成功
Step 1: 读取文件
Step 2: 进行排序
Step 3: 提示排序已完成
-
+
#### make_chart
Step 1: 读取文件
diff --git a/save_data/mm.drawio.svg b/save_data/mm.drawio.svg
new file mode 100644
index 0000000..52b51e2
--- /dev/null
+++ b/save_data/mm.drawio.svg
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\ No newline at end of file
diff --git a/save_data/nn.drawio b/save_data/nn.drawio
new file mode 100644
index 0000000..27ffbc6
--- /dev/null
+++ b/save_data/nn.drawio
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\ No newline at end of file
diff --git a/text.drawio b/text.drawio
index e69de29..9a953e0 100644
--- a/text.drawio
+++ b/text.drawio
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\ No newline at end of file