insert a number abc, receive output a+b+c;

// funtions.cpp.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
using namespace std;
int sum(int num)
{
    int sum = 0;
    int num2 = 0;
    while (num > 0)
    {
        for (int i = 0; i < num; i++)
        {
            num2 = num % 10;
            sum = sum + num2;
            num = num / 10;
        }
    }
    return sum;
}

int main()
{
    int num;
    cout << "Enter a number: \n";
    cin>>num;
    cout<<sum(num);
}