Stack overflow caused by recursive function

Question

I\'m a beginner in C++. Yesterday I read about recursive functions, so I decided to write my own. Here\'s what I wrote:

int returnZero(int anyNumber) {
    if         


        

Answer 1

Using recursion, you can achieve SuperDigit:

public class SuperDigit
{
    static int sum = 0;

    int main()
    {
        int n = 8596854;
        cout< 0) {
            int rem;
            rem = n % 10;
            sum = sum + rem;
            n = n / 10;
            getSum(n);
        }
        return sum;
    }
}