Вывести n целых чисел (массивы не использовать) - C#

int n;
cout << "Enter quantity of numbers : ";
cin >> n;
int multiply = 1;
int num;
for (int i = 0; i < n; ++i)
{
cout << "Enter any digit: ";
cin >> num;
if(num % 10 == 1 || num % 10 == 3)
{
cout << "Digit N " << i + 1 << " ends on 1 or 3" << endl;
}
if (num % 10 == 0)
{
multiply *= num;
}
}
cout << "Product of digits multiple 10 = " << multiply << endl;