#include "pch.h"
#include <iostream>
#include <iomanip>

using namespace std;

int digit(int num);

double total = 0;

int main()
{
    int n = 12345;
    int answer = digit(n);
    return 0;
}
int digit(int num)
{
    if (num % 10 >= 1)
    {
        total = total + (num % 10);
        return digit(num / 10);
    }
    else
    {
        cout << total;
        return 0;
    }
}