filter_1.cpp

#include <algorithm>
#include <iostream>
#include <vector>

int main(void) {
    // Create a vector
    std::vector<uint32_t> v = {1, 2, 3, 4, 5};

    // Filter by copying
    std::vector<uint32_t> res;
    std::copy_if(v.cbegin(),
                 v.cend(),
                 std::back_inserter(res),
                 [&](const uint32_t v) {
                   return v > 3;
                 });

    // Outputs to:
    // 4
    // 5
    for (const auto & r : res) {
        std::cout << r << '\n';
    }

    return 0;
}