average_1.cpp

#include <iostream>
#include <vector>

auto average(const std::vector<uint32_t> & input) -> double;

int main(void) {
    // Create a vector
    std::vector<uint32_t> v = {9, 8, 3};

    // Get the average
    const double avg = average(v);

    // Results in "Average: 6.6667"
    std::cout << "Average: " << avg;

    return 0;
}

double average(const std::vector<uint32_t> & input) {
    uint32_t sum = 0;

    for (uint32_t i = 0; i < input.size(); ++i) {
        sum += input[i];
    }

    return sum / (double)input.size();
}