diff --git a/max_subarray.cpp b/max_subarray.cpp
new file mode 100644
index 0000000..5b8270d
--- /dev/null
+++ b/max_subarray.cpp
@@ -0,0 +1,25 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+
+// Function to find the maximum subarray sum
+int maxSubarraySum(const std::vector<int>& arr) {
+    int maxSum = arr[0];
+    int currentSum = arr[0];
+
+    for (int i = 1; i < arr.size(); i++) {
+        currentSum = std::max(arr[i], currentSum + arr[i]);
+        maxSum = std::max(maxSum, currentSum);
+    }
+
+    return maxSum;
+}
+
+int main() {
+    std::vector<int> arr = {-2, 1, -3, 4, -1, 2, 1, -5, 4};
+    int maxSum = maxSubarraySum(arr);
+
+    std::cout << "Maximum subarray sum: " << maxSum << std::endl;
+
+    return 0;
+}