题解 | 求四位数各个数位之和

题干解读:给出一个四位数n, 要求求出他各个位数的数字的和.

思路:将每一位的数求出后相加即可

#include <iostream>
using namespace std;

int main() {
    int n;
    cin>>n;
    int s1,s2,s3,s4;
    s4 = n/1000;
    s3 = (n/100)%10;
    s2 = (n/10)%10;
    s1 = n%10;
    cout<<s1+s2+s3+s4;
}