#include <iostream>

int main() {
    using namespace std;
    int arr[] = {1,2,3,4,5 };
//for (int i = 0; i < 5; i++) {
// cout << arr[i] << " ";
//}
    for (auto x : arr) {
        cout << x << " ";
    }
//for (auto x : { 1,2,3,4}) {
// cout << x;
//}
    int *beg = std::begin(arr); //arr
    int *end = std::end(arr) ;
//auto &&range = arr ;|
//auto begin = std::begin (range) ;
//auto end = std::end (range) ;

//for(; begin = end; ++begin) {
//auto v= *begin;
//}
    cout << endl << "output buff: ";
    while(beg != end) {
        std::cout << *beg << " ";
        ++beg;
    }
    return 0;
}