#include <iostream>
#include <cmath>
 
using namespace std;
 
int main()
{
	int num, num2, sum = 0, dig;
 
	cout << "Please enter a number" << endl;
	cin >> num;
 
	if(num < 0)
		num = -num;
	num2 = num;
	dig = num;
	do
	{
		do
		{
			dig = dig / 10;
		}
		while (dig >= 10);
 
		cout << dig << " ";
 
		if (num > 100)
			num = num - (100*(num/100));
		else
			num = num - (10*(num/10));
 
		sum = sum + num2 % 10;
 
		num2 = num2 / 10;
 
		dig = num;
 
	}
	while (num2 > 0);
	cout << endl;
	cout << "The sum of the digits is " << sum << endl;
 
	return 0;
}

#include <iostream>
 
int main()
{
  std::cout<<"Enter a number: ";
 
  int num;
 
  if ( std::cin>> num ) {
    int sum = 0;
 
    if ( num < 0 )
      num = -num;
 
    while ( num != 0 ) {
      sum += num % 10;
      num /= 10;
    }
 
    std::cout<<"The sum is "<< sum <<'\n';
  }
}