#include<iostream>
using namespace std;
//arrays
int main()
{
   int SIZE;;
   int a[]= {1,2,3,4,5,6,7,8};
   SIZE = sizeof(a)/sizeof(int);
   float ave;
   int sum = 0;
   
   for (int i = 0; i < SIZE; i++)
     sum = sum + a[i];
   
  ave =  (float) sum / SIZE;   
  cout << ave <<endl;
   
   //system("pause");
   return 0;
}