// Attention: This code does not compile. Why? How do we fix it?

#include <cassert>
#include <iostream>
#include <limits>

/*
 * x is an array with N elements; there must be at least two elements
 * this function returns the second largest value among the elements of x
 */
int second_largest_of(int N, int x[])
{
   // precondition
   assert(N >= 2);
   
   // initialize largest and second_largest to the smallest possible int value
   int largest = std::numeric_limits<int>::min();
   int second_largest = std::numeric_limits<int>::min();
   
   for(int i = 0; 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;
   const int x[fixed_array_size] = {4, 0, 6, 5, 2};
   std::cout << second_largest_of(fixed_array_size, x) << "\n";
}