diff --git a/lab_2/9_const-array.cpp b/lab_2/9_const-array.cpp
new file mode 100644
index 0000000..916f3f0
--- /dev/null
+++ b/lab_2/9_const-array.cpp
@@ -0,0 +1,30 @@
+#include <cassert>
+#include <iostream>
+#include <limits>
+
+/* return the second-largest element of an array
+ * of N integer values (must contain at least two values)
+ */ 
+int second_of(const int N, const int* const x) {
+   assert(N >= 2);
+   int largest = x[0];
+   
+   // smallest possible int value
+   int second_largest = std::numeric_limits<int>::min();
+
+   for(int i = 1; i < N; i++)
+      if(x[i] > largest) {
+         second_largest = largest;
+         largest = x[i];
+      }
+      else if(x[i] > second_largest)
+         second_largest = x[i];
+   return second_largest;
+}
+
+int main() {
+   constexpr int fixed_array_size = 5;
+   constexpr int x[fixed_array_size] = {4, 0, 6, 5, 2};
+   const int t = second_of(fixed_array_size, x);
+   std::cout << t << "\n";
+}