C++解答

#include <iostream>
#include <cstdio>
using namespace std;
int main()
{
	int n,sum=0;
	cin>>n;
	while(n>9)
	{
		// cout<<n%10<<" ";
		sum=sum+n%10;
		n=n/10;
	}
	// cout<<n<<endl;
	sum=sum+n;
	cout<<sum<<endl;
	return 0;
}