#include <iostream>
using namespace std;
int main()
{
int arr[] = { 1, 2, 3, 4, 5, 6 };
float sum = 0;
int arr_size = sizeof(arr) / sizeof(arr[0]);
for (int i = 0; i < arr_size; i++)
sum += arr[i];
cout << "average = " << sum / arr_size << endl;
return 0;
}
/*
run:
average = 3.5
*/