#include <iostream>
#include <vector>
using namespace std;
double average(std::vector<int>& nums) {
int sum = 0;
for(int num : nums) {
sum += num;
}
return static_cast<double>(sum) / nums.size();
}
int main() {
std::vector<int> nums = {1, 2, 3, 4, 5};
double avg = average(nums);
std::cout << "Average is: " << avg << std::endl;
return 0;
}