Question

When I input 210 or 110 or 340 it always returns 0 instead of 3 or 2 or 7. Why isn't it adding the sum of all the numbers?

#include <iostream>

using namespace std;

int main()
{
    long num;
    cout << "Input a number: ";
    cin >> num;
  
   int n = 0;

   while (num != 0) {
      n += num % 10;
      num = num / 10;
   }
   if (num == 0 && n >= 10) {
      num = n;
   }
    
   cout << "Sum = " << num << endl;
   return 0;
}

Answer 1

// Screenshot of the code

// Sample output

// Code to copy

#include <iostream>
using namespace std;
int main()
{
long num;
cout << "Input a number: ";
cin >> num;
  
int n = 0;
while (num != 0) {
n += num % 10;
num = num / 10;
}
   if (num == 0 && n >= 10) {
num = n;
}
  
cout << "Sum = " << n << endl;
return 0;
}

Explanation:

Error code:

cout << "Sum = " << n << endl;