#include <iostream>
#include <vector>
#include <string.h>

using namespace std;


double ave( const vector<int> & arr, int n, bool & errorFlag)
{

        int sum = 0;
	for( int i = 0; i < arr.size( ); ++i )
	  sum += arr[i];

	n = 100;
	errorFlag = true;
	return ((double)sum)/arr.size();
}


int main( )
{
  int nn = 5;
  bool err = false;
  
  vector<int> myArray {1, 2, 3, 4, 5};
  double average = 0.0;
  
  cout << "Before: average = " << average << ", nn = " << nn << ", err = " << err << endl;  

  average = ave(myArray, nn, err);

  cout << " After: average = " << average << ", nn = " << nn << ", err = " << err << endl;  

  return 0;
}