pass by address array in c 2b 2b

1#include <iostream>
2using namespace std;
3 
4// function declaration:
5double getAverage(int arr[], int size);
6
7int main () {
8   // an int array with 5 elements.
9   int balance[5] = {1000, 2, 3, 17, 50};
10   double avg;
11
12   // pass pointer to the array as an argument.
13   avg = getAverage( balance, 5 ) ;
14 
15   // output the returned value 
16   cout << "Average value is: " << avg << endl; 
17    
18   return 0;
19}