#include <iostream>
using namespace std;
int main(int argc, char *argv[]) {
    int n;
    cout << "Enter, please n:";
    cin >> n;
    int a[n];
    cout << "Enter, please a["<<n<<"]:";
    cin >> a[n - 1];
    cout << "sizeof(a) = " << sizeof(a) << endl;
    cout << "a["<<n<<"]:" << a[n - 1] << endl;
    return 0;
}

    int a[n];