Glavna i spored diag - 2D

#include <iostream>

using namespace std;

int main()
{
    int n;
    cin >> n;

    // sozdavash matrica 'a' so 'n' po 'n' elementi
    int a[n][n] = {};

    // gi vnesuvash elementite
    for (int i = 0; i < n; i++) {
        for (int k = 0; k < n; k++) {
            cin >> a[i][k];
        }
    }

    // pechati glavna i sporedna diag.
    cout << "Glavna diag: ";
    for (int i = 0; i < n; i++) {
        cout << a[i][i] << ", ";
    }

    cout << endl;

    cout << "Sporedna diag: ";
    for (int i = 0; i < n; i++) {
        cout << a[i][n-1-i] << ", ";
    }

    cout << endl;

    return 0;
}