diff --git a/src/Math b/src/Math
new file mode 100644
index 0000000..66dc905
--- /dev/null
+++ b/src/Math
@@ -0,0 +1 @@
+undefined
\ No newline at end of file
diff --git a/src/mathProblem.cpp b/src/mathProblem.cpp
index 8f78904..255f0a3 100644
--- a/src/mathProblem.cpp
+++ b/src/mathProblem.cpp
@@ -400,4 +400,4 @@ int main() {
     
     cout << "程序结束，感谢使用！" << endl;
     return 0;
-}
+}
\ No newline at end of file