C语言网题目 1118: Tom数

#include<iostream>
using namespace std;
int sum(long n)
{
	int sum = 0;
	while(n)
	{
		sum += n % 10;
		n /= 10;
	}
	return sum;
}
int main()
{
	
    long n;
    while(~scanf("%ld",&n))
    {
        cout << sum(n) << endl;
    }
    return 0;
}