Function foo

code/4/4.1.cpp:12–16

#include <array>

void foo(int *p, int len) {
    for (int i = 0; i != len; ++i) {
        std::cout << p[i] << std::endl;
    }
}

int main() {
    std::array<int, 4> arr= {1,4,3,2};