diff --git a/C++/Armstrong.cpp b/C++/Armstrong.cpp
new file mode 100644
index 000000000..512806e76
--- /dev/null
+++ b/C++/Armstrong.cpp
@@ -0,0 +1,26 @@
+#include <iostream>
+using namespace std;
+
+int main() {
+    int num, originalNum, remainder, result = 0;
+    cout << "Enter a three-digit integer: ";
+    cin >> num;
+    originalNum = num;
+
+    while (originalNum != 0) {
+        // remainder contains the last digit
+        remainder = originalNum % 10;
+        
+        result += remainder * remainder * remainder;
+        
+        // removing last digit from the original number
+        originalNum /= 10;
+    }
+
+    if (result == num)
+        cout << num << " is an Armstrong number.";
+    else
+        cout << num << " is not an Armstrong number.";
+
+    return 0;
+}