数字求和

此题目来源于LZOI

题目传送门

#include <iostream>
using namespace std;

int main() {
    int n;
    cin >> n;

    int ones = n % 10;
    int tens = (n / 10) % 10;
    int hundreds = n / 100;

    int sum = ones + tens + hundreds;

    cout << sum << endl;

    return 0;
}