how to do sum of digit in cpp code example

Example 1: sum of digits in c++

int x, s = 0;
   cout << "Enter the number : ";
   cin >> x;
   while (x != 0) {
      s = s + x % 10;
      x = x / 10;
   }

Example 2: C++ sum the digits of an integer

// sum the digits of an integer
int getSum(long long n){
  int sum = 0;
  int m = n;
  while(n>0) {    
    m=n%10;    
    sum=sum+m;    
    n=n/10;    
  } 
  return sum;
}