diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index ccfcfb2..7e6453f 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -3,7 +3,7 @@
         {
             "type": "cppbuild",
             "label": "C/C++: g++.exe build active file",
-            "command": "C:\\mingw64\\bin\\g++.exe",
+            "command": "D:\\mingw64\\bin\\g++.exe",
             "args": [
                 "-fdiagnostics-color=always",
                 "-g",
diff --git a/README.md b/README.md
index f01c9dd..b9da172 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@
 ————————————————————————————————————————————
 请选择：
 ```
-#### C0: 退出程序
+### C0: 退出程序
 选择菜单命令:0 再输入:y,确认，则退出程序。若输入:n，则继续程序。
 ```
 请选择：0
@@ -108,4 +108,29 @@ Delete Book
 Which book you wanna delelet?
 Enter book ID: 5
 Not found
-```
\ No newline at end of file
+```
+### C7：修改图书
+选择菜单命令： 7，提示修改和输入图书编号，输入图书编号，再次提示图书数量，输出你要在该图书编号下修改的图书数量，并提示完成；如果输入的图书编号不存在，则提示没有这样的书。
+`````
+请选择：7
+
+Revise Book
+
+Which book you wanna revise ?
+1
+Original book number : 1
+Revised number :2
+**********************
+Revise success
+`````
+
+
+``````
+请选择：7
+
+Revise Book
+
+Which book you wanna revise ?
+2
+No such book
+``````
\ No newline at end of file