#include <iostream>
using namespace std;

double average(int count, ...)
{
   int     sum = 0;
   va_list args;
   va_start(args, count);
   for (int i = 0; i < count; i++)
       sum += va_arg(args, int);
   return ((double) sum) / count;
}

int main()
{
   cout << "Average is " << average(5, 1, 2, 3, 4, 5) << endl;
   return 0;
}